576 



Heat. 



No. .14 842 - 



54842. 1:7. 



54848. 1 : 6. 



54 845. 1 : 7. 



54 846. 1 : 4. 



54847. 1:10. 



54849. 1:8. 54850. 1 : 8. 



54.842. Apparatus for determining the Coefficient of Expansion (pressure-increase Coefficient) * i] 

 of Gases at constant volume. Figure (W. D., Fig. 344 [324]) 0. 10. 



The vessel can also be used for Apparatus N'o. 52,811 in order to admit of the latter being 

 used as an air thermometer: see Fig. 52,81 1, p. 377. 



54.843. Large Glass Flask for determining the Coefficient of Expansion of Air, also the Specific 

 Gravity, with glass stopcock (4 litres capacity) 1. o. o 



t'f. Fig. 53,034, p. 402. 



53,033. Glass Sphere with two Stopcocks, for the same purpose (Fr. phys. Teclm. I, 2, Fig. 2837) 0. 10. 



54.844. Gas Dilatometer, after Friedr. C. G. Miiller (M. T. Fig. 104), consisting of boiling 

 flask (1 litre), large beaker, glass cylinder, calibrated bell, 2 iudiarubber stoppers, 



3 glass tubes with stopcocks and rubber tubing o. 15. 



53.121. Windmill for showing the Motion of Heated Air (M. T. Fig. 105) 0. 3.0 



Thermometers, Pyrometers, and Thermoscopes. 



5I.SJ5. Thermometer Tube, with bulb blown on, F i g u r e. so as to fill and make a thermo- 

 meter oneself for 100" ('. A diagram of I he scale is appended to the tube (dan. -.Man., 

 Fig. 480; Can.- Rein.. Fig. 302) 0. 0. 6 



5i.x if>. Thermometer with ground milk-glass plate, Figure o. 2. o 



The thermometer is mercury filled and ha- a ground milk-glass plate the rough side being in front. 

 The apparatus is intended for demonstration experiments, being ungraduated : tin- yraduation can be 

 attached by the- lecturer as occasion demand- and removed a^uin. The thermometer is dimensioned 

 for 01 '' C. 



5I.X.J7. The Thermometer in 7 Stages of Construction, Figu re; 2 half-finished Maximum 



Thermometers and a high-range Thermometer in three stages of construction .... 1.10.0 



54,8-is. Thermometer with 3 Scales on wood. Figu re, 350 x 50 mm, graduations in Reaumur. 



Centigrade and Fahrenheit degrees, from --20" to -100" Centigrade 0. 2.0 



cl. ss. r.i.-ifi. 



1697, 1698, 4195. 3412, 6120. 



