30 
looking at the place affected the farmer can see the insect in all its stages, and, at 
the same time, by referring to the Patent Office Agricultural Reports, can find out 
the remedies in general use. 
That Mr. Glover contemplated such a work before he came to Wash- 
ington is evident from a number of plates on stone still in existence, 
made early in the decade from 1850 to 1860. He has more than once 
alinuded to it in conversations with me, and but for the counter interest 
in pomology, and in the preparation of his models of fruit, he would 
have attempted it at that time. I take pleasure in reproducing here a 
plate made by him in February, 1852, which contains some ten species 
of insects, all of which are tolerably well drawn. (Fig.5.) His work at 
Fig. 5. 
that period had attracted the attention of Dr. Harris, and some ten 
months after this plate was made he was in receipt of a letter from the 
doctor acknowledging his superior skill in the delineation of insect 
forms, and asking his co-operation in the preparation of a new work on 
entomology. I give herewith the main portion of Dr. Harris’s letter, 
only omitting a page or more of explanation of figures in the plates 
Mr. Glover had sent him. It is as follows: 
CAMBRIDGE, Mass., December 15, 1852. 
Dear Sir: Your letter of the 7th instant with the specimens of yourengraving and 
the drawing of the pear-tree insects, reached me this day, and I am very much grati- 
fied by these tokens of your remembrance. 
