THE CUEKANT BUD-MITE, OR CURE ANT GALL-MITE. 287 
By far the most important experiments with this disease were con- 
ducted on his Grace the Duke of Bedford's fruit farm at Ridgmont, under 
Fig. 157 b. — Diseased Branch of Fig. 157 a. — Healthy Branch of 
Black Currant. Black Currant. 
Both natural size, from a photograph. 
the direction of Mr. Spencer Pickering, F.R.S., and the manager, Mr. 
Lewis Castle, while the microscopical investigations were kindly placed in 
my hands for report. The experiments were begun in December, 1897, 
