''Sm-Si, mTH^^^^^ SilJcworm Cultivation. 309 
healthy moths, which in their turn shall be capable of producing 
healthy eggs. 
(4). To assume this result, it is necessary to maintain all those 
hygienic and other conditions before mentioned. 
Letter from Signor Cornalia to M. Pasteur, read to the French 
Academy, and puhUshed in the ' Comjptes Rendus/ * LXVIII., No. 
11, 1869. 
* The original Frencli is so obscure, and the repetitions are so numerous, that 
the translator has in many cases condensed and paraphrased M. Cornalia's remarks, 
without, it is hoped, modifying its sense. It may be mentioned also that M. Pasteur 
is spoken of in the third person, instead of the second, as occurs in the corre- 
spondence. — Ed. S. O. 
