they fall back again into the twenty gallons of water. 



Where, oh, where is that 12 -inch thermostat? 



Where is the new feature which they had proven ; 

 the thermostat that was as sensitive to the heafs 

 action as the thermometer itself? Did a rat carry 



FOURTH ACT (from tenth annual catalogue, first 



edition). 



"* AUTOMATIC HEAT REGULATORS." The 

 , as originally patented, was not 

 equipped with an automatic regulator. The value 

 of a trustworthy regulator was appreciated, how- 

 ever, ( What about the twenty gallons of water and 

 the four ventilating holes, which in First Act, cata- 

 logue No. 5, was a regulator simple, perfect and 

 absolutely reliable ?) and during a number of years 

 extensive experiments were made by us along this 

 line. ( We should say so, when within one year four 

 different catalogues were used to convince pro- 

 spective customers that the machine had a simple, 

 perfect and reliable regulator, while they were 

 ringing the changes on the twenty gallons of water 

 and four ventilators, the 12 inch rubber, brass and 

 steel thermostat, the twenty gallons of water and 

 four ventilators again, and then the severed band cf 

 brass and soldered steel wires.) So-called lamp 

 trips were tried and found to be untrustworthy. 

 The rubber thermostat, or rubber bar was faithfully 

 tried, but was found to lose its power after three or 

 four hatches and thus become worthless. (Less 

 than a year before they said they had a complete 

 109 



