LABORATORY SUPPLIES AND CHEMICALS 



373 



6466 



6468 



6466 THERMOSTAT, Pencil Type. The Thermostat shown herewith is used for 

 controlling temperatures of liquids. It consists of a thin copper tube 

 hermetically closed at the bottom end, so that it may be partly immersed 

 in liquids without damage to the interior. A sensitive bimetallic bar 

 extends from the bottom half way up the tube 



The range of the Thermostat is from 30 to 80 degrees Centigrade. 

 A special condenser is mounted inside the tube. The .condenser kills 

 the electric spark when the contact points are separated, thus protecting 

 same against destruction, provided the electric current does not exceed 

 1 ampere. 



The dimensions of the Thermostat are: 6 inches in length x 54-inch in 

 diameter. 



Price, complete. $12.00 



6468 Combination Electric Heater and Pencil Type Thermostat for Heating and Con- 

 trolling Temperature of Liquids in Water Baths. 



The apparatus consists of a heating disc, measuring five inches in diam- 

 eter by one-half inch in thickness and an adjustable pencil type electro- 

 themostat, measuring six inches in length by five-eighths of an inch in 

 diameter, together with a pilot lamp indicating when the current is on 

 or off. 



They are mounted together and are self-contained, with a six-foot cord 

 and attachment plug, which may be connected to any 110-volt electric light 

 socket. 



Constant water level in the bath is desirable for best results; water bath 

 heater provides for the maintenance of any temperature between 35 de- 

 grees and 60 degrees Centigrade in any suitable utensil. It is not necessary 

 to use a water bath as shown in the illustration. The apparatus can be 

 applied to any water bath where the maximum capacity of water does 

 not exceed two quarts. 



Price, complete without water bath $25.00 



