HSONIAN INSTITUTION LIBRARIES 
A 
3 9088 01272 6949 
the larvee of Tineola biselliella or of the black carpet beetle (Attagenus 
piceus), ° an alternation of a low temperature with a comparatively 
high one invariably results in the death of the larvee of these two insects. 
For example, if larvee of either which have been kept at a temperature 
of 18° F. are removed to a temperature of 40° to 50° F., they will 
become slightly active and, when returned to the lower temperature 
and kept there for a little time, will not revive upon a retransfer to the 
warmer temperature.”’ 
It is reeommended, therefore, that storage companies submit goods 
to two to three changes of temperature as noted before placing them 
permanently in an apartment kept at a temperature of from A0® to 422 ik. 
The maintenance of a temperature lower than the last indicated is need- 
less and a wasteful expense. Where the cost of cold storage is not an 
item to be seriously considered, the adoption of this method for pro- 
tection of goods during the hot months is strongly recommended. 
Approved : 
JAMES WILSON, 
Secretary of Agriculture. 
WASHINGTON, D. C., December 20, 1907. 
O 
ll 
