On Table I is found tabularized the weekly results per Markaz 

 given in percentages of bolls attacked by Gelechia. 



Examination of this table at once shows that samples of 100 bolls 

 only are not sufficient to base any conclusions on. 



On Table II these weekly records have been condensed to give 

 percentages of the attacks for each Mudiria. It will be seen that 

 the weekly results are now based on bigger figures, that the bolls have 

 been taken over a more extended area, and that the ratio of increase 

 from week to week no longer shows the same big fluctuations as 

 appeared in the results based on the smaller Markaz figures of 

 Table I. 



On Table III these results have again been recalculated under 

 the divisions Lower, Middle, and Upper Egypt. For this purpose 

 Lower Egypt consists of the Mudirias of Beheira, Gharbia, Daqahlia, 

 Sharqia, Menul'ia, Qaliubia and the Markaz Embaba. Middle Egypt 

 is considered as being Giza Mudiria (after deduction of Embaba), 

 Beni Suef and Fayum Mudirias. All Egypt south of and including 

 Minia Mudiria has been considered as being Upper Egypt. 



The figures from which the percentages have been calculated are 

 naturally largest for Lower Egypt, and probably approximate fairly 

 closely to the actual state of the attack. The figures given for Upper 

 Egypt are based on the smallest numbers of figures and are naturally 

 least reliable, besides which no great similarity of results need be 

 expected from the widely separated localities composing the district in 

 question. 



In the course of the examination it was soon recognized that 

 100 bolls was too small a number to base any record on, and, in order 

 to find out what variation might be expected, four larger tests were 

 made, which will Tbe found tabulariy.ed in Tables IV, V, VI, and VII. 

 For the first three tests the bolls were all taken from one field, for the 

 last test the bolls were taken in small numbers from many places 

 scattered over a large area. 



