Volume III, Part II (Gough and Storey, " Methods for the Destruction 

 of the Pink Boll Worm in Cotton Seed"), the conclusions arrived at 

 beirg : 



" Three different methods of destroying Gdechia larvae have been 

 found effective and. commercially applicable, namely : 



" (1) Hot-air treatment. 



" (2) Treatment by poisonous gases. 



"(3) Treatment by soaking in cyllin solution 1 : 1,000. 



' The methods indicated under (1) and (2) are applicable on a 

 large scale at the time of ginning and (3) only immediately before 

 sowing. No treatment is possible when the seed is in the sacks." 



As soon as these conclusions had been reached, an experimental 

 hot-air machine was erected by M. Crovisier of the State Domains 

 Administration, and a carbon bisulphide fumigation machine was 

 constructed by Messrs. Thos. Cook & Son to a design of the 

 Entomological Section. Both these machines were exhibited at 

 Sakha in June 1914 to a meeting of ginners and others interested, and 

 reports on them wsre published in the "Agricultural Journal of 

 Egypt," 1914, Volume IV, Part II (Storey, " Notes on Large Scale 

 Experiments against the Pink Boll Worm in Cotton Seed "), together 

 with a note on a mechanical cleaner devised and built by Messrs. W. 

 R. Dell & Son, of London. In spite of the fact that the two former 

 machines were successful in doing what was asked of them, neither 

 of them found favour with the ginners, the hot-air machine on account 

 of its clumsiness and immense size compared with its output together 

 with the danger of damaging the seed by overheating, and the 

 fumigation machine on account of the poisonous and inflammable 

 qualities of carbon bisulphide. The objections to the latter were 

 apparently more serious than to the former. The Entomological 

 Section therefore turned its attention to the hot-air treatment and 

 designed an experimental machine, on much the same principle as 

 some of the tea-drying machinery made by Messrs. Marshall & Sons. 

 Though still very cumbersome, this was much less so than the Domains 

 machine, and having a larger ouoput gave one a better idea of the 

 commercial possibilities of the process. This machine was to have been 

 completed by February 1915. Owing to difficulties caused by the 

 war, however, it was not actually delivered till November of that 

 year. 



