Intelligence and Miscellaneous Articles. 311 



respecting a memoir by MM. Dubois- Aym6 and Bigeon, on the de- 

 velopment of plane curves ; it contained nothing new, but some 

 varied examples, which maybe useful. — A report by M. Cauchy on a 

 work by M. Paulet, relative to the theory of numbers, which con- 

 tained nothing worthy of attention. 



I\1M. Despretz and Cagniard-Latour terminated the sitting by 

 reading two memoirs ; the former on the modifications which metals 

 undergo in their physical properties by the combined action of heat 

 and ammoniacal gas ; the latter on the cause of the sounds which are 

 produced by blowing with the mouth. 



April 6. — Letters and Manuscript memoirs: A letter from M. 

 Quoy on the geological collections made during the voyage of the 

 Astrolabe. — Lithographic proofs retouched after the first impressions, 

 by a process invented by MM. Chevallier and Langlume. — A memoir 

 by M. Robert, physician to the Lazaretto of Marseilles, on the iden- 

 tity of the epidemic of Paris and of a disease known in the Antilles 

 by the name o{ giraffe or Colorado. — A letter from M. Serullas on the 

 iodide of azote. — A note relative to Roberval's method of tangents, by 

 M. Duhamel. — A letter from M. Julia-Fontenelle, containing an ana- 

 lysis of an Italian work by Dr. Trevisan, on the mortality of new-born 

 infants. — A memoir on the condensations and linear dilatations of 

 solid bodies, by M. Cauchy. 



April 13. Letters and Manuscript memoirs: A memoir by M. N. 

 Le Bceuf, on the annual motion of the earth. — New observations on 

 the yellow fever, bv M. Leymerie. — A notice respecting the longevity 

 at the commencement of the 19th century, by M. Benoiston of Cha- 

 teauneuf. — A letter from M. Serullas, announcing that the chloride of 

 azote of chemists is a chloride of azotized hydrogen. — Description of 

 a new lighting apparatus by MM. Galy, Caralat, and Dubain. — M. 

 Blainvillegavean account of the descriptionof the whale cast on shore, 

 in the department of the eastern Pyrenees, which MM. Farines and 

 Carcassonne had sent to the Academy. —M. Cuvier reported on the 

 memoir of M. Roulin respecting a new species of Tapir, which he 

 had found in America. — M. Tessier gave a verbal account of a work 

 published by M. Le Vicomte d'Harcourt, intitled " Reflections on the 

 agricultural and commercial state of the central provinces of France." 

 — M. Poisson gave a favourable account of M. de Pont("COulant's 

 memoir relating to the part of the inequalities of Jupiter and Saturn, 

 which depends upon the square of the perturbating force. — M. Poisson 

 read a notice on the intimate constitution of fluids. 



L. Intelligence and Miscellaneous Articles. 



OKRIVATION OF THE WORD THEODOLITE. 



A Constant Rkader wishes to know the derivation of the 

 word Tlicodnlitc ; tiic derivation given in Johnson's Dictionary, 

 from ^BOLuj I see, and SoXtyjjs long, not being quite .satisfactory 

 cither as to tlic formation of the word, or as the name of an instru- 

 ment for measuring imrizontal angles. — And likewise wlictlicr the 

 in strument is of British or of French origin. 



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