ANIMAL REPRODUCTIONS. 28% 
‘experiments fhould fucceed, 1. ufed all necefs 
* {ary precaution ; for, by neglecting it, thefe rep» 
* tiles perifh, as muft have happened to thofe of 
©* M. Adanfon, Bomare, and Father Cotté. But 
* I did not follow the plan adopted by others of 
‘ immerfion in water to force them out. Had 
*‘ M. Bonnet omitted it, his {nails would have fur» 
‘ vived. Perhaps in this I might be too {crupu- 
‘lous. My method was to put them on young 
‘ grafs, and wait patiently till they were ful- 
§ ly extended, then, with a pair of fharp {ciflars, I 
‘ fevered the head immediately behind the large 
‘horns. Each feparated part was examined both 
© by myfelf and thofe affifting at the operations. 
‘ The fnails were then fhut up in a jar, covered 
¢ with a paper full of holes, that the internal air 
* might change, and not become prejudicial to 
* them. | 
‘ On the 28 of Auguft, I found the paper torn, 
© and fome of the {nails {ticking to the outfide of 
* the veflel. They all appeared when put on 
€ grafs, but reproduction had made unequal pro« 
* grefs, for only a tubercle appeared on the trunk 
‘ of fome, while in others reproduction was come 
* plete. | 
‘ I fent many of the {nails to the editor of the 
¢ journal, with a letter, in which I requefted him 
¢ to invite our critics to examine my proofs. In — 
* the next journal, 1 had the fatisfaction to fee an 
© anfwer, 
