i8 94 .] 



GOOSEBERRY RED SPIDER 



221 



tablets, and Mr. Zimmermann was going to have a loaf baked 

 of some of this flour, and consumed in his own large house- 

 hold, without letting them know there is anything peculiar 

 about it ! I am to know results ; and I have said I should 

 like a piece of the experimental loaf. I hope we shall not 

 all be made very miserable indeed. If the flour rises 

 properly, and the bread is fit to be eaten, then I am 

 meditating getting an experiment made as to the destruc- 

 tive powers of the fumes by some of our folks here connected 

 with milling, and also suggesting to Mons. ]. Danysz, 

 Director of the Laboratory of Parasitology, Bourse de 

 Commerce, Paris, whether he might care to experiment 

 in some of the French mills with which he had been in 



From life ; Red spider (outline figure after Koch) both magnified. 

 Infested leaf, natural size. 



FIG. 52. GOOSEBERRY AND IVY RED SPIDER, BRYOBIA PR/ETIOSA, 

 C. L. KOCH. 



communication regarding destruction of E. kuhniella. The 

 chemical is sold in tablets like large thick lozenges, and also 

 as a fluid, and, I believe, in powder. 



Enclosed is a little packet of seed of the pink hawkweed, 

 which you thought pretty while here last summer, and a few 

 seeds also of the white Lathyrus (vetchling). I hope they 

 may remind you how welcome your visits here are. 



June 20, 1894. 



I was so sorry to learn from Professor Riley's circular that 

 he really had resigned, and also from some observations in it 



