MISCHIEF OF MEADOW-MOUSE 73 
each tree with wire or cord. Tarred paper 
should never be used on very young trees, and 
when used on others should not be left in place 
during the summer, since it may injure the 
growing tree. 
Various paints and washes have been recom- 
mended to prevent attacks of mice and rabbits 
in orehards. The majority of these are with- 
out merit and some of them are liable to kill 
young trees. Some of the washes require re- 
newal after every hard rain. In experiments 
with a wash of whale-oil soap, crude carbolic 
acid, and water, for apple trees, it was found 
that in about forty-eight hours the carbolic acid 
had so far evaporated that mice renewed their 
work upon the bark. Blood and grease, said to 
give immunity from rabbit attacks, would invite 
the attention of field-mice. . 
Reports recently received by the Biological 
Survey seem to indicate that the ordinary lime- 
and-sulphur wash, recommended for the winter 
spraying of trees to destroy the San Jose scale, 
is an effective preventive of the attacks of both 
mice and rabbits. The wash is very cheap 
(from 1 to 2 cents a gallon when prepared in 
