LABORATORY SUPPLIES AND CHEMICALS 



173 



2923 



2923 DUST, TAR and Moisture Determination Apparatus, consisting of a test meter, 

 across the top of which is fixed a brass pipe which serves as a flue for the 

 gases to be tested, as well as a support for the filter holders. Each 

 holder is separated by loosening the thumbscrews, and the filter paper 

 through which the gas passes may be inserted or removed without 

 disarranging the operation or adjustment of the other parts. An electric 

 light in the clean side of the filter holder keeps any moisture in the 

 gas sufficiently volatile to prevent disruption of the filter paper. To 

 the filter holders are attached the calcium chloride beakers to absorb 

 the moisture, and a manometer and 'thermometer on the meter permit 

 reductions of metered to standard gas. 



Complete with meter $200.00 



Single dust filter without meter 50.00 



2025 



2926 



2927 



2925 GAS BURETTE, Bunte's, with two stopcocks $ 9.00 



2928 GAS BURETTE, Bunte's, with support, reservoir and rubber connections.. 15.00 

 2927 GAS BURETTE, Elliott's, for analysis of furnace and illuminating gases; 



complete with reservoirs and rubber connections 20.00 



