642 



Thermal Conduction, etc. 



No. 55322 - 



55 322. 1 : 3. 



55 325, 55 326. 1 : 12. 



55 326. 1 : 7. 



55 323. 1 : 8. 



53 078. 1 : 9. 



53 077. 1 : 7. 



55330. 1:10. 



55,322. Apparatus for Thermal Conduction of Gases, after Weinhold, Figure (W. D., 

 Fi. 383 [363]) ................................ 



55,323. Apparatus for Thermal Conduction and Convection in Gases, Figure, after Bebens- 

 torff, on stand, tilting back on hinges, for steam heating (Ztschr. f. d. phys. u. chem. 

 U., 21, 1908, p. 300) ....... ........ .............. 



The two comparison glass tubes are filled with, say, hydrogen and air. They are fitted with 

 conical jackets of thermoscopic paper, wound round the heating tubes. The apparatus is used suc- 

 cessively in a vertical and horizontal position. 



53,078. Apparatus for demonstrating the Cooling Effect of Gases, Figure, after Tyndall 

 (Tyndall, Warine [Heat], Fig. 83), with lateral flexible tube stopcock for introducing 

 gases, and a cock for connecting up to the air pump, for placing on the air pump plate 



55,325. Radiation Tube after Eebenstorff, F i g u r e, with 3 telescopic tube parts, a detachable 

 radiation cone, a slide tube of pasteboard, blackened inside (Ztschr. f. d. phys. u. chem. 

 U., 21, 1908, p. 303), can also be used for experiments on the propagation of air-impulses 

 (Fr. phys. Techn., I, 2, Fig. 3709), price exclusive of thermal source or coloured leaves 



55,320. Thermal Supply for Radiant Heat, after Rebenstorff, Figure, consisting of a Bunsen burner with 

 slotted head and gauze rectangle (Ztschr. f. d. phys. u. chem. V., 21, 1908, p. 300) ........ 



s. d. 

 0. 8. 



1.10.0 



55,011. 10 Thermoscopic coloured Leaves after Eebenstorff 



53,077. Apparatus after Davy, Figure, for Thermal Reflection in vacuo, receiver with 

 two concave minors, thermometer and heating wire, for setting up on the air-pump 

 (Gan.-Eein., Fig. 408) 



53,750. Parabolic and Cylindrical Mirrors alter RebenstoilT, see Fig. 53,750, p. 476, for reflection 

 experiments (Ztschr. f. d. phys. u. chem. I'., 21, 1908, p. 302) 



Cl. 1929, 

 4150, 5070, 

 4117,3884, 



! 2. 0.0 



d. 18.0 



0. in. it 

 0. 4.0 



3.3. 

 0.16. 



4160, 

 6056. 



