Séance du /? Jdiiiner 1916 17 



même manièro (juaiid il fail coiii|)I("'U'meiil nuit, mais 

 robscurité fsl le grand obstacle pour des obser\ations 

 de ce genre. 



Notes on a Machine to kill Gelechia larvae by Hot-Air 



and the Effects of Heat on Gelechia larvae and 



cotton-seed. 



bv D' Lkwis (iok.ii 



In January 1911 Mr. Storey and 1 piiblislied the re- 

 sults of a series of experinuMits made to discover a me- 

 thod of treating (".otton-seed in ordi'r to lull (leleehia 

 larvae without injuring the seed. 



As a result of these ex|)erimenls two machines were 

 eonstructed and erected at the Slat(^ Domains at Sakha. 

 These machines were, lirslly ; a fumigating apj)aratus 

 built to our design by Messrs T. (looked Son, Hulacand^ 

 secondly, a machine acting by Hot Air, designed and 

 constructed by Mr. (aovisier of the Slate Domains, 



lîoth Machines wt'rc demonstrated to ginners and 

 other persons interested in .lune 191 1. Our fumigating 

 machine lullilled all thai was expected of il, killing the 

 larvae without damaging tin- seed, at a piice that would 

 not be exorbitant. It however did not meet the approval 

 of the ginners because the gas we were using, Carbon 

 bisulphide, is explosive when mixi'd with air, and the 

 ginners were afraid that ils em|)loyment might mean u 



