seeds from different kinds of cotton, it is essential that the machine 

 should IH> made in such a way thai it ran easily le emptied or cleaned 

 out when a fresh variety of seed is to lie treated. 



We may now pass on to a consideration of the individual machines. 



(H) .M, \Clll.NKs IX \\IIICI! THK 11KATED 



UY ,\ (VliKKNT (IF Hoi Allt. 



(6) The Mini nf r;/ <>j .l</i-irn!/n>-t''x Hoi-air Mdffiinr. An account 

 of this macliine by Dr. Cough has been published in the Ministry's 

 Bulletin No. ti. .The seed is carried ba.ckwa.rds and forwards through 

 the hot-air chamber on a succession of endless bands consisting of 

 chains of narrow transveise trays which by a device drop the seed 

 to the nexl lino of trays just before reaching the rollers, so that in 

 this way the lower part of each hand is utili/ed as well as the upper 

 and the seed traverses the length of the machine eight t imes. although 

 there are only four endless hand.-. At 1 he top of the machine is 

 a fan which draws a current of air through, and at the bottom are 

 two doors, one leading lo a chamber where the air is heated by passing 

 over the flues of a furnace, and the other opening to the outside air. 

 The temperature of the ingoing 'id thus of the treated seed, is 



regulated by adjusting these t\\o do 



Tilts machine, which has an output of from one and a half to four 

 ardebs per hour, according to the rale at which it is run. was erected 

 purelv as a.n experimental model. Having been found to give satis 

 factory results, however, it v. iting consignments of cotton 



seed for export. Four hundred ardebs of seed were treated in this 

 way for the Sudan. This seed was exceptionally free from worms 

 and it was very difficult to lind any in it. either alive or dead. After 

 treatment, however, not a single living worm was toiind either in 

 the examinations carried out in the Entomological Section in Cairo 

 or by the Sudan officials. The results of the germination tests of tilt- 

 treated seed were : 



_><>( An! l/i/i 



rntiv;iied '.I7-1' 



tod .: H7--J 



100 Anl.-hs S,ik<'ll<tri<lt'x 



I'mi-oatcd 



Treated !.vo 



10(1 Anirl.s ,/*/(/-. 



I/utivated 96-9 



Treated ... '>! 



