Obfervations on the Hejfian Fly, 107 



in a year, does not entirely reft on my own particular experi- 

 ments and obfervations, but has been corroborated by the 

 obfervations and experiments of the gendeman, to whom I have 

 before alluded in treating on this fubjeft. How far this account 

 may have been confirmed, or contradifted by others who may 

 have obferved the various phenomena of the infeft, I am not 

 able to fay ; but if it fhould appear upon further inveftigation, 

 that what has been here advanced is erroneous, it ought to give 

 me and every other lover of truth, great pleafure to ftand 

 correfted, on a fubjeft of fo much importance to the public. — ■ 

 It has been before obferved, that the fureft way of arriving at 

 truth on thisfubje6l, is to examine the progrefs of the infeft in. 

 the field ; and to carry this into efFe8, I would fuggeft the 

 following method : — Let thofe who may have leifure and curi- 

 ofity on this fubjeft, and who may refide in different parts of 

 the country where the infeft may prevail, fow fmall patches of 

 different kinds of wheat, as often as once or twice in a month, 

 during the whole feafon, adjoining to fome field of wli««tt or 

 ftubble, where the infeft may be found in greateft number ; 

 and let the progrefs of the infe6t be obferved on thofe different 

 patches of wheat ; and let the refult of thefe obfervations be 

 colleded and compared with each other ; this, if it could be 

 carried into effeft, I have conceived would be the fureft method 

 of arriving at certainty on this fubjeft, and perhaps fomediing 

 not now thought of might be difcovered, which would prove 

 cin efieSlual remedy againft the injurious effe6ls of this infe6l. 



