EFFECTS PRODUCED BY PINK BOLLWORM ON THE YIELD OF COTTON SEED. 311 



From this table we can also conclude that the damage done to the crop at Gemmaiza 

 was rather worse than the average for the Delta ; this is important, as it shows us 

 that the damage to the crop as estimated from the Gemmaiza figures would be rather 

 too high to use as an average for the Delta. The Wadi Tumulat again was considerably 

 worse than Gemmaiza. On the other hand, the Armant samples were very near 

 to the average for the whole of Upper Egypt. 





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Table XX has been prepared to show the average weekly percentage of sound bolls 

 obtained at Gemmaiza, Wadi Tumulat and Armant in each Muderieh, and in Lower, 



