cp j^cp sg cp gp ^ i g P ^ fifc gp cp eg cp sp*!^ 



FIG. i. 



THE THERMOSTATIC INCUBATOR. 



The Thermostatic Incubator was patented July 

 31, 1877, by E. S. Renwick. It was one of the 

 finest hot water incubators made in its day. It is 



81 



