Adrien-Jean-Pierre Thilorier

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Adrien-Jean-Pierre Thilorier
Born(1790-02-16)16 February 1790
Paris
Died2 December 1844(1844-12-02) (aged 54)
Known forDevelopment of a machine for compressing gases, first production of dry ice
Scientific career
FieldsTechnology
InstitutionsThe French Post Office

Adrien-Jean-Pierre Thilorier (16 February 1790 – 2 December 1844) was a French inventor who was the first person to produce solid carbon dioxide ("dry ice").

Early years

Adrien-Jean-Pierre Thilorier was born in Paris, France, on 16 February 1790.

con men who defrauded the cardinal and the jewelers. Count Cagliostro was suspected of being involved in the fraud and was arrested, but Thilorier won a verdict of not guilty. Jean-Charles was also interested in science and mechanics: He invented a radeau-plongeur (diving wheel) to allow vehicles to cross rivers.[4] In 1800, he designed a poêle fumivore (smoke-eating stove; i.e., smokeless stove).[5] In 1803, he published a pamphlet on meteorites,[6] in 1812, he published a pamphlet on comets,[7] and in 1815, he published a four-volume work on science.[8]

Nothing is known about where Adrien Thilorier received his scientific education, although his father obviously was interested in the subject. Adrien may have been trained as a lawyer.[9]

Mention of Thilorier's technical work first appeared in 1826: he developed and patented a "hydrostatic lamp" for lighthouses.[10] As the lamp burned and consumed its oil, a dense aqueous solution of zinc sulfate flowed from the solution's reservoir into the oil reservoir, displacing the oil and thereby maintaining a steady flow of oil to the lamp's wick.[11]

By 1828, competing versions of Thilorier's lamp had appeared on the market, and Thilorier was upset by what he regarded as patent infringement. (Thilorier's lamp was a refinement of similar "hydrostatic lamps", which had been patented by the Girard brothers on 15 December 1804 and by Mr. Verzy on 8 March 1810.) Thilorier asked the French Academy of Sciences to investigate the matter, which they did; but Thilorier didn't receive much satisfaction as the academy simply stated that the lamps of Thilorier and his competitors were all better than those of the Girard brothers.[12] Nevertheless, Thilorier continued to patent improvements to his lamp in 1828 and 1832[10] and in 1835.[13] In 1835, Thilorier, with Mr. Serrurot (a lamp maker), received a patent for an improved lamp, which was called a lampe-autostatique.[14] In 1837, Thilorier, with Mssrs. Serrurot and Sorel, received a patent for an apparatus that heated liquids by using thermal expansion of the liquid and a siphon to circulate liquids between a heater and a holding tank.[15]

Thilorier's compressor

By 1829, Adrien Thilorier had developed a machine for compressing gases. A wealthy French aristocrat,

atmospheres
.

Thilorier subsequently made several improvements to his compressor. One problem with his original compressor was that the effort that was required to compress the gas was greatest at the bottom of the piston's stroke, at which point the gas's pressure was greatest. Thilorier solved this problem by using a fusée, a device that watch makers used to allow a watch's mainspring to exert a constant torque as the mainspring unwound and its force became weaker. Thilorier reversed the function of the fusée: in his compressor, the fusée allowed a constant force that was supplied by the compressor's source of power (men) to be converted into a force that increased as the piston neared the bottom of its stroke. Thanks to this modification, one man could now power the compressor instead of the ten men that had been required earlier. He also changed the method of cooling the compressor, and he reduced the number of cylinders from three to two. He obtained a patent for this improved compressor.[17][18]

Thilorier entered his improved compressor in the competition for the Montyon prize of 1830—and again won the prize for mechanical improvements (700 francs).[19] He foresaw several uses for the products of his compressor: Initially he thought that compressed air could power a cannon.[20] However, he later suggested that compressed air could be used to provide a portable source of air for undersea divers (such as Paul Lemaire d'Angerville), to carbonate soda water, to force oils and syrups through filters, to serve as the fluid in a hydraulic press, or to power a vehicle or even a submarine.[21]

In 1832, Thilorier won the Montyon prize for mechanical improvements yet again, after submitting a "hydrostatic vacuum pump". It was a type of mercury pump: mercury flowed through a tube to which was joined a tube from the vessel that was to be evacuated; the flow of mercury trapped bubbles of air from the vessel and then transported the bubbles away from the vessel.[22] Thilorier was awarded 300 francs.

In 1832, French government documents list Thilorier as an employee of the French Post Office, residing in Paris at no. 21 Place Vendôme.[23]

Apparatus for producing liquid carbon dioxide

Mareska and Donny's version (1845) of A.J.P. Thilorier's apparatus for making liquid carbon dioxide, showing the generator (right) and the receptacle (left).

In 1834, Thilorier sent the French Academy of Sciences a letter in which he described experiments with liquid carbon dioxide, which had been produced by a new apparatus, by means of which " … he obtained, by chemical means, and in a few moments, a liter of liquefied carbonic acid [i.e., carbon dioxide]."[24]

Thilorier's original apparatus for liquefying carbon dioxide used tanks made of cast iron.[25] However, cast iron is brittle and so there was a danger that such a tank might rupture under pressure. The apparatus could be dangerous: On 30 December 1840, Osmin Hervy, who prepared scientific demonstrations for lectures at the School of Pharmacy in Paris, was operating one of Thilorier's machines when the gas-generating cylinder exploded. Shrapnel broke Hervy's legs, one of which had to be amputated; he died of infection a few days later.[26] To reduce the danger of explosion, the cast iron was replaced with wrought iron.[25]

By 1845, the Belgian chemists Daniel-Joseph-Benoît Mareska (1803-1858) and François-Marie-Louis Donny (1822-1896) had replaced the iron with copper and lead.

Charles-Adolphe Wurtz:[28]

The apparatus is composed of a generator and a receptacle; the generator is a cylindrical lead boiler, covered with red copper and reinforced with pieces of forged iron. The capacity of this boiler is 6-7 liters. The generator is suspended between the two points of a cast iron base. The receptacle is formed from a vessel of lead contained in a cylinder of copper surrounded by rings of iron. The opening of the generator is sealed by a screw cap, pierced along its [i.e., the cap's] axis and fitted with a valve. The receptacle likewise bears an opening on its upper edge; one inserts in this opening a copper tube which descends almost to the bottom of the receptacle and which is fitted on the outside with a valve. One establishes a connection between the receptacle and the generator by means of a copper tube. In order to produce carbonic acid, one introduces into the generator 1,800 grams of sodium bicarbonate, 4½ liters of water at about 35° [C, 95°F], and a cylindrical copper cup containing 1 kilogram of concentrated sulfuric acid; one places it [i.e., the copper cup] along the axis of the generator, one closes it [i.e., the generator] and one rocks it around its axis [i.e., the two points of support of the cast iron base], in a way that the acid flows and reacts with the bicarbonate; at the end of ten minutes one opens the valves in order to allow the carbonic acid to pass into the receptacle. The acid distills by virtue of the difference in temperature that exists between the two parts of the apparatus; one proceeds to a new preparation of carbonic acid that one allows to pass in the same way into the receptacle; by repeating [this procedure] five or six times, one can accumulate up to 2 liters of liquid [carbonic acid].

Thilorier was not the first person to liquefy carbon dioxide: Michael Faraday had liquefied it in 1823.[29] However, with an ample and reliable supply of liquid carbon dioxide, Thilorier was able to observe and measure its properties, such as its vapor density and its extraordinary rate of expansion with temperature, under a wide range of conditions.[30]

First production of "dry ice"

At the 12 October 1835 meeting of the French Academy of Sciences, a letter from Adrien Thilorier was read in which he stated that he had solidified carbon dioxide:[31]

Original: Si l'on dirige un jet d'acide carbonique dans l'intérieur d'une petite fiole de verre, elle se remplit promptement, et presque en entier, d'une matièr blanche, pulvérulente, floconneuse, qui adhère fortement aux parois, et qu'on ne peut retirer qu'en brisant la bouteille.

Translation: If one directs a jet of [liquid] carbonic acid [i.e., carbon dioxide] into the interior of a small glass vial, it quickly fills, and almost completely, with a material [that is] white, powdery, fluffy, which adheres strongly to the walls [of the vial], and which one can remove only by breaking the bottle.

What is particularly interesting about Thilorier's discovery of dry ice is that he did not realize that he had solidified carbon dioxide until a group of scientists from the French Academy of Sciences explained to him what he had accomplished:[32]

Original: M. Thénard fait remarquer que M. Thilorier n'avait pas encore imaginé, au moment de la visite des commissaires de l'Académie, que la substance blanchâtre obtenue par lui fût de l'acide carbonique solide. Ce fait, dit-il, a été reconnue et constaté par la commission: c'est elle qui a soumis l'acide à la plupart des expériences citées par l'auteur.

Translation: Mr. Thénard [i.e., French chemist Louis Jacques Thénard (1777 – 1857)] noted that Mr. Thilorier had still not imagined, at the time of the visit of commissioners of the Academy, that the whitish substance obtained by him was solid carbonic acid. This fact, he says, was recognized and noted by the committee: it is they who submitted the acid to most of the experiments cited by the author [i.e., Thilorier].

Thilorier thought that the liquid carbon dioxide had caused water vapor in the air to freeze on the vial; he was puzzled when the "snow" sublimated instead of melting.[33]

Thilorier reported to the French Academy of Sciences the properties of solid carbon dioxide. News of Thilorier's achievement was published not only within France but in Germany, Britain, and the United States.[34]

The French positivist Auguste Comte was so impressed by Thilorier's investigations of gases that he devoted the twentieth day of the ninth month of his positivist calendar to British chemist John Dalton—and to Thilorier.[35]

When dry ice was mixed with diethyl ether, it was called "Thilorier's mixture",[36][37] presumably since Thilorier had noted in 1835 that a mixture of liquid carbon dioxide and ether produced extreme cold when sprayed on objects.[38] It was subsequently found that under reduced pressure, temperatures as low as −110 °C could be maintained.[39] These mixtures ("dry ice baths") could thus be used to maintain low temperatures during experiments.

Mistaken identification

Unfortunately, in almost all of his technical articles, Adrien Thilorier gave his name simply as "Thilorier";[40] similarly, whenever others referred to him in technical articles, his name was also given only as "Thilorier". This impeded efforts by scholars to identify him subsequently.[41] The confusion was compounded when Paul Thénard wrote a biography of his father, Louis Thénard, the chemist who explained to Thilorier in 1835 that his "snow" was actually solidified carbon dioxide. In a footnote of that biography, Paul Thénard identified the "Thilorier" who discovered dry ice as "Charles-Saint-Ange Thilorier", a student at the École polytechnique in the class of 1815.[42] This (mistaken) identification was mentioned by Duane H. D. Roller, a graduate student at Harvard University, in a paper that was published in 1952.[43] Consequently, many sources claim that Charles-Saint-Ange Thilorier discovered dry ice.

During the 1960s, Madeleine Ambrière-Fargeaud, a scholar in France, was trying to identify the person who served as the model for a "mad scientist" character, Balthazar Claës, in Honoré de Balzac's novel La Recherche de l’absolu (The Quest of the Absolute). Her research suggested that Claës was inspired (in part) by Adrien-Jean-Pierre Thilorier.[44] By 2003, Joost Mertens, a Dutch historian of science, had verified many of the findings that Ms. Ambrière-Fargeaud had made about Thilorier.[1]

That "Thilorier" is actually Adrien-Jean-Pierre Thilorier is proved by French government documents, especially patents. His 1826 patent for a hydrostatic lamp lists his name as "Thilorier (Adrien-Jean-Pierre)" of Paris. His 1831 patent for a gas compressor also lists his name as "Thilorier (Adrien-Jean-Pierre)" and describes him as an employee of the "Administration des postes" (i.e., the Post Office) in Paris. In 1832, the Bulletin of the laws of the kingdom of France also lists him as "Thilorier (Adrien-Jean-Pierre)" and as an employee of the Post Office, who resided at number 21 on the Place Vendôme in Paris, and as the inventor of a gas compressor.[23] In 1835, the government bulletin La France industrielle lists him as "Thilorier (Adrien-Jean-Pierre)" residing at no. 4 on rue de Bouloi in Paris and as the recipient of a patent for a hydrostatic lamp.[45] In 1836, The London Journal of Arts and Sciences; and Repertory of Patent Inventions lists him by his full name as the recipient of a patent for a hydrostatic lamp.[46]

References

  1. ^ a b c Joost Mertens (2003) "Du côté d’un chimiste nommé Thilorier: Balthazar Claës modèle d’Adrien Thilorier" (Towards a chemist named Thilorier: Balthazar Claës model Adrien Thilorier), L'Année balzacienne 2003, 1 (4) : 251-263.
  2. ^ According to this source -- Frantz Funck-Brentano, L'Affaire du Collier Archived 2016-03-04 at the Wayback Machine [The Affair of the Necklace] (Paris, France: Librarie Hachette et Cie., 1901), page 281 footnote. -- Jean-Charles Thilorier was born in 1756 in la Rochelle, France, the son of a lawyer; he had two sons: Adrien and Nicolas-Charles.
    Available in English as: Frantz Funck-Brentano with H. Sutherland Edwards, trans., The Diamond Necklace … (Philadelphia, Pennsylvania: J.B. Lippincott, 1901), footnotes on pages 284-285.
  3. ^ Biographie Universelle Ancienne et Moderne, 2nd ed. (Paris, France: Madame C. Desplaces, 1843-1865), vol. 41, pages 376-377.
  4. ^ See:
    • (Minutes of the meeting of January 20, 1795), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 1 : 5, 7, and 33.
    • Jean-Charles Thilorier, Nouvelle théorie sur la navigation des fleuves (Paris, France: Imprimerie de la rue des Petits-Augustins, 1795).
  5. ^ See:
    • Patent 192: Thilorier, "Pour des poêles fumivores, … " (For smoke-eating stoves, … ), Description des machines et procédés spécifiés dans les brevets d'invention … , 3 : 144-186 (1820) ; issued: June 30, 1800.
    • "Poêles fumivores de M. Thilorier" in: Ardenni and Julia de Fontelle with M.F. Malepeyre, eds., Nouveau Manuel Complet du Poelier-Fumiste, ou Traite complet de cet art … , 2nd ed. (Paris, France: Librarie Encyclopédique de Roret, 1850), pages 229-235.
  6. ^ Jean-Charles Thilorier, Genèse philosophique, précédée d'une dissertation sur les pierres tombées du ciel [Philosophical genesis, preceded by an essay on stones [that have] fallen from the sky] (Paris, France: Imprimerie de Chaignieau Aine, 1803).
  7. ^ Jean-Charles Thilorier, Découverte de la véritable cause de la queue des comètes … [Discovery of the true cause of tails of comets] (Paris, France: Chaignieau Aîné, 1812)
  8. ^ Jean-Charles Thilorier, Système universel, ou de l'Univers et de ses phénomèmes considérés comme les effets d'une cause unique [Universal system, or on the universe and its phenomena considered as the effects of a single cause] (Paris, France: Self-published, 1815).
  9. ^ Frantz Funck-Brentano (February 1, 1901) "Le Collier de la Riene" (The Queen's necklace), La Revue de Paris, 1 (3) : 626-652 ; see especially the footnote on page 629. From page 629: "Jean-Jacques Thilorier mourut le 20 juin 1818. 7. rue Neuve-des-Capucines, avec le titre d'avocat aux Conseils du roi. Il était âgé de soixante-deux ans. Il laissiat deux fils dont l'un, Adrien-Jean-Pierre, fut lui-même avocat." (Jean-Jacques Thilorier [this is an error; his correct name was Jean-Charles Thilorier] died on June 20, 1818, at 7 Neuve-des-Capucines Street, with the title lawyer to the King's Council. He was age 62 years. He left two sons, one of whom, Adrien-Jean-Pierre, was himself a lawyer.)
  10. ^ a b Patent 4913: Adrien-Jean Thilorier, "Pour une lampe hydrostatique," Description des machines et procédés spécifiés … , 44 : 416-429 (1841); issued: May 12, 1826.
  11. ^ For a detailed description and explanation of the hydrostatic lamp, see: Edmund Ronalds and Thomas Richardson, Chemical Technology; or Chemistry in its applications to the arts and manufactures, 2nd ed. (London, England: H. Baillière, 1855), vol. 1, part ii, pages 486-488.
  12. ^ (Minutes of the meeting of 15 December 1828), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 9 : 161-163 (1828-1831 ; published: 1921).
  13. ^ La France industrielle, 2 (14) : 186 (May 1835).
  14. ^ La France industrielle, 2 (14) : 188 (May 1835).
  15. ^ Patent 5096: Sorel, Thilorier, and Serrurot, "Pour le chauffage des liquides par circulation" (On the heating of liquids by circulation), Description des machines et procédés spécifiés … , 46 : 71-74 (1842); issued January 11, 1837. The apparatus is illustrated in the lower right-hand corner of page 517.
  16. ^ See:
  17. ^ Patent 2896: Thilorier, Adrien-Jean-Pierre, "Pour le perfectionnement d'une machine à comprimer le gaz, …" (For the improvement of a machine to compress gas, …), Description des Machines et Procédés consignés dans les brevets d'invention, … , 30 : 251-267 (1836); issued: May 16, 1831.
  18. ^ A number of journals reproduced the contents of Thilorier's patent application for his pump. See, for example:
  19. ^ (Minutes of the meeting of July 19, 1830), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 9 : 447-448 (1828-1831 ; published: 1921) ; page 447: "Le no 2, intitulé Perfectionnéments de la pompe à compression, a été déposé par M. Thilorier." (The second place titled Improvements of the compression pump has been collected by Mr. Thilorier.)
  20. ^ (Minutes of the meeting of July 18, 1831), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 9 : 665 (1828-1831 ; published: 1921): "M. Thilorier annonce que son système de compression de l'air vient d'être appliqué à une machine de guerre par M. Perrault." (Mr. Thilorier announces that his system of air compression will be applied to a war machine of Mr. [Claude] Perrault [(1613-1688)].)
  21. ^ "Pompe à comprimer les gaz, exécutée d'après la théorie qui a obtenu en 1829 le prix de mécanique fondé par M. De Montyon." (Pump for compressing gases, made according to the theory that won in 1829 the prize for mechanics founded by Mr. De Montyon.), Bulletin de la Société d'encouragement pour l'industrie nationale, 19 (315) : 345-366 (September 1830); see especially pages 359-360.
  22. ^ (Minutes of the meeting of Nov. 12, 1832), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 10 : 151-152 (1832-1835 ; published: 1922).
  23. ^ a b The Bulletin des Lois du Royaume de France (Bulletin of the laws of the kingdom of France), 9th series, part ii, no. 92, page 74 (February 1832) lists: "24° M. Thilorier (Adrien-Jean-Pierre) employé à l'administration des postes, demeurant à Paris, place Vendôme, no 21, auquel il a été délivré le 16 mai dernier, le certificat de sa demande d'un brevet d'invention de dix ans pour le perfectionnement d'une machine à comprimer le gaz; …" (24th Mr. Thilorier (Adrien-Jean-Pierre) employed at the Post Office, residing in Paris, Place Vendôme, no. 21, where was delivered May 16th last, the certificate, by his request, for a patent of invention for ten years for the improvement of a machine to compress gas; … )
  24. ^ (Minutes of the meeting of June 16, 1834), Procès-verbaux des séances de l'Académie [Minutes of meetings of the Academy] (Académie des sciences), 10 : 536 (1832-1835 ; published: 1922): "On lit une lettre de M. Thilorier sur un appareil à l'aide duquel il obtient, dit-il, par voie chimique, et en peu d'instants, un litre d'acide carbonique liquéfié." (There was read a letter from Mr. Thilorier on an apparatus by means of which he obtained, he says, by chemical means, and in a few moments, a liter of liquefied carbonic acid.) Thilorier's letter is reproduced in:
    • "Lettre de M. Thilorier sur l'acide carbonique solide" (Letter from Mr. Thilorier on solid carbonic acid), Comptes rendus … , 3 : 432-434 (1836).
    • L’Institut, journal universel des sciences et des sociétés savantes en France et à l'étranger, 2 (58) : 197-198 (1834).
    • A German translation of Thilorier's letter appears in: "Flüssigmachung des kohlensauren Gases" (Liquefaction of carbonic acid gas), Journal für praktische Chemie, 3 : 109-112 (1834); page 111: "Der Apparat, mit Hülfe dessen ich in wenig Augenblicken einen Liter kohlensaures Gas flüssig mache, wird mir eine Erleichterung bei der Untersuchung dieser Verhältnisse an die Hand geben." (The apparatus, with the help of which I make liquid in a few moments a liter of carbonic acid gas, will make available to me some ease during the investigation of these behaviors.)
  25. ^ a b A description of Thilorier's original apparatus, and an account of its evolution with illustrations is given in: Henry Enfield Roscoe and Carl Schorlemmer, A Treatise on Chemistry (New York, New York: D. Appleton and Co., 1883), vol. 1, page 628-631.
  26. ^ See:
  27. ^ J. Mareska and F. Donny (1845) "Mémoire sur un appareil de Thilorier modifié et sur les propriétés de l'acide carbonique liquid et solide" (Memoir on a modified Thilorier apparatus and on the properties of liquid and solid carbonic acid), Mémoires couronnés et mémoires des savants étrangers publiés par l'Académie royale des sciences et belles-lettres de Bruxelles, 18 : 1-33.
  28. ^ Charles-Adolphe Wurtz, Dictionnaire de chimie pure et appliquée (Paris, France: Librarie Hachette et Cie, 1870), volume 1, part 2 , page 751.
  29. ^ Michael Faraday (1823) "On the condensation of several gases into liquids," Philosophical Transactions of the Royal Society of London, 113 : 189-198; see especially pages 193-194.
  30. ^ See:
  31. ^ See:
    • Thilorier (1835) "Solidification de l’acide carbonique" (Solidification of carbonic acid), Comptes rendus … , 1 : 194-196.
    • Thilorier (1835) "Solidification de l’acide carbonique" (Solidification of carbonic acid), Annales de chimie et de physique, series 2, 60 : 432-434. Available on-line at: University of Ghent
  32. ^ Thilorier (1835), Comptes rendus … , page 196.
  33. ^ See:
    • Paul Thénard, Un grand Français: Le chimiste Thénard (1777-1857) (Dijon, France: Imprimerie Jobard, 1950), p. 177.
    • Thomas O'Conor Sloane, Liquid Air and the Liquefaction of Gases: A Practical Work … , 3rd. ed (New York, New York: Norman W. Henley Publishing Co., 1920), page 138.
  34. ^ See:
  35. ^ See:
    • Auguste Comte, Calendrier positiviste … , 4th ed. (1852).
    • Frederic Harrison, ed. The New Calendar of Great Men (London, England: Macmillan and Co., 1892) page 407.
  36. ^ Faraday, Michael (1845) "On the liquefaction and solidification of bodies generally existing as gases," Philosophical Transactions of the Royal Society of London, 135 : 155-172, 172-177 ; from page 157: "For the application of cold to these tubes a bath of Thilorier's mixture of solid carbonic acid and ether was used."
  37. ^ Yorgos Goudaroulis (1994) "Searching for a name: the development of the concept of the critical point (1822-1867)," Revue d'histoire des sciences, 47 : 353-380 ; see especially page 366.
  38. ^ Thilorier (1835) "Propriétés de l'acide carbonique liquide" (Properties of liquid carbonic acid), Comptes rendus … , 1 : 163-166. On page 165, he mentions mixing liquid carbon dioxide with ethanol and with diethyl ether; on page 166, he mentions the extreme cold that a mixture of ether and liquid carbon dioxide can produce.
  39. ^ Harry C. Jones, Introduction to Physical Chemistry (New York, New York: The Macmillan Co., 1910), pp. 40-41.
  40. ^ However, his name is given as "A. Thilorier" in one article: A. Thilorier (1836) "Acide carbonique liquéfié et solidifié" (Liquefied and solidified carbonic acid), Journal de chimie médicale, de pharmacie et de toxicologie, 2nd series, 2 : 3-8.
  41. ^ Even a brief (romanticized) biographical article about Thilorier didn't mention his first name. See: Samuel-Henry Berthoud, Les Petites chroniques de la science (Paris, France: Garnier Frères, 1861), volume 2, pages 180-186.
  42. ^ Paul Thénard (1950), p. 176.
  43. ^ Duane H. D. Roller (1952) "Thilorier and the first solidification of a "permanent" gas (1835)", Isis, 43 : 109-113 ; see especially page 111.
  44. ^ Madeleine Ambrière-Fargeaud, Balzac et "La Recherche de l’absolu", 2nd ed. (Paris, France: Presses Universitaires de France, 1999), pp. 91-107.
  45. ^ La France industrielle, 2 (14) : 186, 188 (May 1835) lists Adrien Thilorier by his full name as the recipient (p. 186) or co-recipient (p. 188) of patent for a hydrostatic lamp. On both pages he is listed as a ferblantier (tinsmith) residing at "rue de Bouloi no. 4" in Paris.
  46. ^ The London Journal of Arts and Sciences; and Repertory of Patent Inventions, 8 : 118 (1836).
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