No. 55217. 



Calorimetry. 



625 



55213. 1:15. 



55 217. 1 : 8. 



55 214. 1 : 10. 



55,214. Calorimeter after Bertholet-Mahler, improved by Kroeker, Figure, for calori- 

 nictric determinations by means of a combustion bomb, for Technical Purposes . . . 



The apparatus consists of a steel bomb 300 com content, enamelled inside, polished and nickcllcd 

 outside, with insulated platinum pole and platinum tube carried to the bottom of the bomb; Stirrer 

 arranged for hand and motor drive; a nickelled Water Vessel with oak insulating jacket and thermo- 

 meter holder; a Thermometer divided in Vso C.; a Manometer on stand with parts for connecting 

 to the bomb and to the oxygen cylinder; a Steel Mould for making coal briquettes; a Support for the 

 Bomb for use while screwing down the lid; a Clay Capsule; various spanners; a Valve Adjusting 

 Pin ; Ignition Wire and spare Lead Packing Rings. 



The bomb is filled with oxygen from a steel cylinder; this should be ordered separately if not 

 available. 



55,215. -- idem, for Scientific Use 



This apparatus differs from the preceding in that the inner surface of the bomb lid is coated with 

 platinum iind that the valve points are of platinum-indium. Instead of the clay capsule there is a 

 Platinum Crucible with platinum holder and clamping screw. The insulating vessel consists of ;i 

 double-walled copper jacket and should be filled with water at room temperature. The thermometer 

 is divided in Vioo" C., is provided with a Test Certificate from the Physikalisch-Technische Reichs- 

 anstalt, and has a magnifier for reading. 



55,2 1<. Apparatus for determining the Generation of Heat by the simple Mixing of different 

 Liquids, after Bussy and Buignet, Figure, with thermometer divided in 0.2 C 1 . . 



s. d. 

 24. 15. 



Liable to 

 alteration 

 owing to 

 fluctuating 

 price of 

 platinum 



38. 10. 



Liable to 

 alteration 

 owing to 

 fluctuating 

 price of 

 platinum 



3. 15. 



>5,217. Apparatus for determining the Heat of Neutralisation on mixing Acids and Bases, 



Figure (W. u. E., phys. Prakt., Fig. 126) 1. 4. 





Cl. 1867, 1863, 

 1869, 41G3. 



40 



