608 



Heat and Change of State. 



No. 55 083 



55 087. 1 : 5. 



55 089. 1 : r>. 



55 088. 1 : 3. 



55 090. 1 : 4. 



53.074. Refrigerator after Carre 1 , Fig. 53,074, p. 405 (W. D., Fig. 391 [371]), for producing ice 

 by evaporation, and with enclosed ether glass for demonstration of the heat freed by 

 condensation of steam, on stand 



53.075. - - idem, without ether glass, after Berberich (W. D., Fig. 390 [370]; Fr. phys. 

 Techn. II, 2, Fig. 3631) 



53.076. Refrigerator after Weinhold, Fig. 53,076, p. 405, completely assembled for setting 

 on the plate of the air pump (W. D., Fig. 392 [372]) . 



55.083. Apparatus for the Retardation of Freezing, after Weinhold (W. D., Fig. 350 [330]) 



55.084. Cryophorous after Wollaston (M. P. Ill, Fig. 361 [II, 2, Fig. 218]) 



55.085. Cryophorous after Weinhold (W. D., Fig. 393 [373]) 



55.086. Cryophorous after Grimsehl, specially adapted for demonstrating ebullition at low 

 temperature (Ztschr. f. d. phys. u. chem. U. 16, 1903, p. 376), with thermometer. . 



55.087. Sulphuric Acid Cryophorous after Weinhold, Figure (W. D., Fig. 394 [374]), with 

 funnel for filling 



55.088. Apparatus for Evaporating Ice, F i g u r e (W. D., Fig. 395 [375]) 



55.089. --idem, Figure, with platinum gauze for rendering incandescent by ;i voltaic 

 current (W. D. Fig. 396 [376]) 



* 55, (i(o. Andrews' Press for Compressing and Liquefying Carbonic Acid, F i g n r c, arranged 

 for the Projection Lantern (W. D., Fig. 363 [343]) 



The carbonic acid tube is protected for transit by a screw-on metal sheath. The liquefaction 

 of the carbon dioxide is plainly visible. If the apparatus is set up before the Projection Lantern 

 (which can be done very conveniently), the carbonic acid tube is cooled by blowing air front above 

 through a clean glass tube screwed on, see Pig. 55090. 



s. d. 

 0. 11/0 



0. 9.0 



0. 10. 

 0. 2.0 



(i. 2.6 

 0. 3.0 



0. 10. 



0. 4.0 

 0. 10. 



0.15.0 

 2. 4.0 





* Can be used with the Projection Apparatus. 



Cl. 1808, 



4890, 1814 



