AT 
Entomosporium were more abundant than when treated twice. This is 
especially observable with the glue mixture on Entomosporium, so much 
so, in fact, as to induce the belief that something must have occurred 
to vitiate the experiment; but it is also the case to a much less extent 
with the Bordeaux and copper chloride mixtures. Of all the copper 
compounds the copper saccharate and the glue mixture gave the best 
results for scab, with Bordeaux mixture as a close second; while for 
Entomosporium the ammoniacal solution gave the best results, followed 
by Bordeaux mixture. From this it is evident that the two diseases 
can not be successfully treated together by anything except Bordeaux 
mixture. 
(4) There is no great difference in the cost of the treatments, the 
variation in the trees treated twice being from 2.8 cents to 4.7 cents, 
the former for sodium hyposulphite and the latter for ammoniacal solu- 
tion. Proportionately, two treatments cost more than three, and three 
treatments more than seven, but less than two. 
(5) Of the two compounds in which there was no copper at all, po- 
tassium sulphide gave the better results-—-better even than any of the 
copper compounds, as far as injury to foliage and fruit were concerned; 
but neither was so effective in preventing scab and Entomosporium 
as Bordeaux mixture. Sodium hyposulphite has comparatively little 
effect on Entomosporium, potassium sulphide giving far better results. 
TREATMENT OF DISEASES OF NURSERY STOCK. 
In 1889 a series of experiments resulting in the first successful method 
of protecting nursery stock from the attacks of a number of fungous 
diseases was inaugurated. This work was continued in 1890 with 
highly satisfactory results. The plan of the work in both these years 
necessitated the use of stock which had already been subjected to 
one, two, and even three seasons’ attacks of parasitic fungi. While 
this was not objectionable in an experiment where the control steck 
was not treated at all, it did not afford a fair test of what could be done 
by beginning the work with the seedling or cutting, and continuing it 
uninterruptedly until the tree was of salable size. The experiments of 
1889 and 1890 had shown that by preventing leaf-blight a growth could 
be obtained in two years equal to that of three where this disease was 
allowed to take its course. It was believed that by beginning the treat- 
ments with the seedling or cutting even more marked results could be 
obtained. With this idea in view the work in 1891 had for its object 
the following: 
(1) To determine the feasibility of successfully growing French and 
American pear seedlings in this country. Pear seedlings are now 
nearly all imported from Europe, simply because they can not, except 
in a few favored localities, be grown here on account of leaf-blight. 
