Disease of Silkworms. 123 



lisJied from 1832 to 1836 '■'■Traite de Teratologie,^^ 3 vols, in 8vo, with 

 plates—" Essai de Zoologie Generale ou Memoires sur le Zoologie Gen- 

 erale P Anthropologie et VHistoire de la Science, in 8vo. 1840."— "^/s- 

 tom Naturelle des Insects et des Mollusques,'' 1841. 2 vols. 12mo, with 

 figures.—" Vie, Travaux, et Doctrine Scientifique, d'Etienne Geoffroy St. 

 Hilaire,'' 1847, in 8vo. — " Catalogue Methodique du Museum d'Histoire 

 Naturelle," 1851, in 8vo.-^'' Domestication et Naturalization des Ani- 

 maux Utiles," \Sb^.—'' Histoire Naturelle Generale des Regnes Organ- 

 ique,PrincipalementchezV Homme." 1854-1857. 5vols.in8vo. Besides 

 these works there are many memoirs scattered through the Comptes 

 Eendus, the Annales des Sciences Naturelles, the Bulletin de la Societe 

 Zoologique d' Acclimatation, &c. 



From this it is easy to see that Isidore Geoffroy St. Hilaire deserves 

 an honorable place in the annals of science, althougli his services are less 

 appreciated because they have not equalled those of his father. But 

 from what we have enumerated it is evident that he had sufficient knowl- 

 edge, enterprise and zeal to make his way for himself. It was obvious 

 to all who met him that fortune had loaded Isidore Geoffroy with favors 

 without drying up his sympathies or rendering him egotistical. He sym- 

 pathized with all sufferers and interested himself especially for those men 

 of science whom fortune little favored nor did he wait for the rich or 

 powerful to patronize them before he became interested for them. 

 , In 1854 he was president of the Academy of Sciences, before which 

 time he had no acquaintance with the chemist Laurent whom he knew 

 only by reputation. It was sufficient for him to learn the precarious 

 situation of the widow and children of the chemist to induce him to go 

 at once to Madame Laurent and place at her disposal all the influence of 

 1"^ name and position as president of the Academy of Sciences. AVe can 

 «ay of him as we said of Biot, that he was a member of the prmcipal 

 it^iimed societies of the world. . ^_, ^ . 



^Acclimation.— We cannot better conclude the obituary of Isidore Geof- 

 % St. Hilaire than by noticing the one great work of his life, the 

 " Societe Zoologique (T Acclimatation," the success of which is becoming 

 more and more remarkable, thanks on the one hand to its organization 

 and on the other to the zeal and the talents of the men who composed it 

 Md who, like Messrs. Richard (of Cantal)* and Guerin MeneviUe, devoted 

 themselves to natural history from the love of it, having made great 

 progress in such studies long before the establishment of the Society ot 

 Acchraatatioc. 

 . ^i'^ease of Silkworms.— Coincident with the formation of this Society 



appearance of a scourge 



iich has several 

 [iifeatened to destroy Xe^oFtLgVeat^^ndustries of France the silk cuU 

 -""■^•, which alone yields 300,000,000 francs per annum. Ihe si k man- 

 ^^a,^tured in France is not a 1 produced in the country. The silkworm 

 ordinarily produces about 150 000 000 francs of raw silk besides which 

 ^' import about 60,000,000 francs value more. This silk after being 

 ^i-H'Ufactured at Lyons Nismes, St. Etienne, &c., acquires a value of more 

 '""^- "10,000,000 of francs. The disease of the silkworm becomes there- 

 ""tse manufacturing centres a perfect scourge; hence from its very 

 * This Journal, [2], xxviii, p. 431. 



