242. 
0. This note is published in the hope that, attention being drawn to 
dis decuit other investigators may assist in the inquiry, so that 
shapes themselves :— 
(i.) By Td of the re of iron and copper to the field 
before ng. Dr. Cunningham's researches have afforded a clue 
to the failure of this method won atpliód to o the growing cro 
Used in this way, it succeeds with the ordinary blight, and in the 
absence of microscopical investigation, it was anas f to find that 
ithad absolutely no effect on this disease, but, as the fungus is 
found to establish itself at once in the deep pede it is clear that 
external applications to the plant can be of no use. The fungal 
germs can, however, be attac 
soil so treated, and sown with healthy seed, an untainted crop 
can vs produced, a considerable step in advance will have been 
( ii) By improved cultivation. The method adopted at the Poona, 
arm, of growing the potatoes on ridges as in Europe, promises to 
afford considerable protection. There is little doubt that a saturated 
surface soil is favourable to the es and this it gets in NO MT 
the native method of growin g potatoes on the flat 
1 
iens ridge system, in any case, deserves to be fully tried. 
append a few instructions as to the solutions referred to in the 
ee paragraph, 
Minds / E. L Car 
Director, Land d Records and 
Poona, 11th June 1892. Agriculture, Bombay. 
: Copper sulphate solution with quicklime (“ Bouillie Bordelaise ") for 
acre i— 
45 lbs. sulphate of copper. 
221 lbs. quicklime. 
220 gallons of water (2,200 Ibs.). 
The sulphate should be dissolved by hanging it in M coarse cloth or 
asket in water contained in a woodeu vessel ` water acts more 
quickly. The quicklime is slaked in a separate E. and then stirred 
into a fin ine grae! with added water. This should be passed th ro eae a 
sieve into the solution, well gine... and the 
be ERA quicklime is made in the same ortio LS. 
interire in Gah coe dou ae alee 

