Royal Academy of Sciences of Paris. 305 



could be manufactured only in an inferior manner by any other 

 process ; and concluded by explaining the principles and use of a 

 new instrument invented by him, and called a Perspectograph. 



Amongst the objects in the library was a very large specimen of 

 native silver from Mexico. 



ROYAL ACADEMY OF SCIENCES OF PARIS. 



Oct. 1. 1827. — M. Julia Fontenelle exhibited a well preserved 

 head of an inhabitant of New Holland. — M. Latreille gave a very 

 favourable account of the monograph, presented by M. Bois-Duval, 

 of the tribe of Zygenides, of the order Lepidoptera. — M. Geoffroy- 

 Saint-Hilaire, made a very favourable report respecting a notice of 

 a monstrous child, by M. Rambur, physician at Ingrandes. — M. Po- 

 isson read a memoir on sonorous bodies; and M. Cauchy stated that 

 he had made similar researches. — MM. Milne Edwards and Audoin 

 presented anatomical researches on the nervous system of the Crus- 

 tacea. M. Cagniard de Latour communicated the results of several 

 new experiments which he had made respecting the vibration of so- 

 norous bodies. 



Oct. 8. — M. Tournal communicated some details respecting the fos- 

 sil bones of the caverns of the department of the Aude. — Dr. Thomas 

 Young thanked the Academy for having recently elected him a Fo- 

 reign Associate. — M. Rousseau, of Coucy-le-Chateau, sent a memoir 

 on the improvement of forceps. — M. Parseval sent a supplement to 

 his last Memoir on Analysis. — M. de Senne communicated a work 

 on the operation of tracheotomy. — M. Magendie gave a favourable 

 account of M. Breschet's memoir on false consecutive aneurism of 

 the heart, and true aneurism of the arteries. — M. Mirbel made a fa- 

 vourable verbal report on the botanical part of M. Freycinet's Voyage 

 edited by M. Gaudichaud. — M. Frederic Cuvier read an extract of a 

 work on the development of the bristles of the hedgehog. — M. Cag- 

 niard continued his communication respecting his researches on so- 

 norous vibrations. 



Oct. 15.— M. Julia Fontenelle sent a sealed packet. — M. Delafuge 

 presented a manuscript entitled : Nouvelle Jerusalem apocalyptique. 

 — M. Joseph Anastasi sent a memoir On practical mechanics. — The 

 Academy afterwards heard ; A memoir by M. Binet on the solution 

 of indeterminate equations of the first degree. — Researches by M. Des- 

 pretz On the heat disengaged during combustion. — A memoir by M. 

 Gasparin, On European climates. — Researches by M.Desvoidy on the 

 vertebral organization of the Crustacea, the arachnida, and insects. — 

 And a work by M. Delpech on the resection of the inferior maxillary 

 bone. 



Oct. 22. — M. Champie sent a manuscript containing some new pro- 

 positions in geometry. — M. Serullas announced that he had formed a 

 bromide of arsenic. — M. Cordier gave a very favourable verbal ac- 

 count of the Geological Essay on the Environs of Issoire, published 

 by MM. Devese and Bouillet. — M. Lacroix, in the name of the 

 commission, read an analysis of M. Binet's memoir On the determi- 

 nation of the orbit of comets, which was not approved of. — M. Savart 



New Series. Vol. 3. No. 16. April 1828. 2 R read 



