HISTORICAL REVIEW 
glass 
refrigerator 
cooler t connpres.jI . 
(cooling coils I J 
not shown) 
window ^^ 
REFRIGERATOf 
EMG 
thermocouple 
recorder 
vibration 
recorder 
copper 
tubing 
^ 
ra 
Figure 3. Apparatus for stucfying shivering in cats. 
11 
