624 



Technical Calorimeters. 



No. 55 200 



55200 55211. 1:15 



55 211. 1 : 5. 



55204,55212. 1:15. 



55.200. Calorimeter after Junkers, Figure, for technical Calorific Value Determinations of 

 Gases and, in connection with auxiliary outfit No. 55,213, for calorific value determina- 

 tions of Liquids, of copper and brass, carefully nickelled, with gas burner 



For Accessories see Nos. 55,201 55,213. 



The apparatus works continuously (since combustion is continuous), and even in the open air 

 and, in view of the fact that a steady flow of water is used which carries from the instrument in each 

 moment as much heat as is conducted into it. Two thermometer readings and the determination of 

 gas and water volume suffice for estimating the calorific value. This can be done even by the unskilled 

 and with an accuracy which attains, if not surpasses, the best of the scientific methods used up to now. 



The calorimeter consists essentially of a special tube boiler which, while very compactly constructed 

 allows the flame sufficient room to expand and permits of complete combustion, while at the same time 

 it effects very energetic cooling of the gases in such a way that the heat is entirely taken up by the 

 water current. At the same time sufficient draught is produced. The regularity of the water flow is 

 secured by a special arrangement serving to keep the pressure of the water perfectly constant. A 

 cock permits of adjusting the strength of the water flow and consequently of varying the temperature 

 of eduction. By means of a throttle valve fitted in the flue it is possible to regulate the quantity 

 of air necessary for combustion. 



In order to avoid the absorption and emission of heat at the surroundings, the calorimeter is 

 covered by a well-polished nickelled jacket. Between the two is a still stratum of air. Thermal trans- 

 mission is therefore reduced to the lowest minimum and can even be avoided altogether by making 

 the mean temperature of the instrument equal the room-temperature, which can easily be done by 

 the regulating cock mentioned above. After the calorimeter is started, the water placed in it and the 

 burner introduced, the steady state is attained in a few minutes and the measurements can be proceeded 

 with. 



55.201. 2 Thermometers for to + 50 C., divided in >/ 10 Each 0.7.6 



55.202. 2 Magnifiers for reading Each 0. 7. 6 



55.203. Case for the Calorimeter, very neat pattern 



55.204. Gas Meter for 3 litres. Figs. 55,200 and 55,204 



55.205. 2 Thermometers for to + 50 ('., divided in whole degrees Eacli 0.2.6 



55.206. Cylindrical Glass Measure for 2000 ccm, graduated every 20 ccm, for measuring the eduction water 



55.207. idem, for 100 ccm, divided in ] /i ccm, for measuring the condensing water 



55.208. Case for the Gas Meter 



55,2O!I. 4 Rubber Stoppers fur inserting the thermometer 



55,21(1. 5 m Rubber Tubing 



.V,.:MI. Gas Pressure Governor, of bra.-, finely niekelled. with reservoir. Figure, with (i l.rass plates and 

 1 extra valve 



.V>.-M_! Gas-Meter Calibrating Device, !'!. .">">. 204, for 1 litre calibration-volume, consisting of calibration fla-k. 

 liras.- stand, nicely nieUelled. and water vessel, without gas-meter 



.>.-).213. Auxiliary Outfit for Calorific Value determinations of liquid fuels. Figure 



The outfit consists of a Precision Balance, 1 Carburetting Lamp for liquid fuel- and 1 extra Burner 



Head for spirit. 



s. d. 

 17. 0. 



0. 15. 



0. 15. 



1. '2. 

 4. 16. 

 0. 5. 

 0. 7. 

 0. -2. 

 0. 17. 

 i). 1. 

 0. 7. 



2. I.'., 



3. 15. 



8. H. 



. 



Cl. 1SU4, 18(15. 1866. 



