612 



Heat and Change of State. 



No. 55116 - 



55 117. 1 : 5. 



55 123. 3 : 4. 



55 125. 1:16. 



55 126. 1:10. 



55.116. Double-walled Capsule for obtaining solid air by means of liquid hydrogen (Erdmann, 

 Anor. Chemie, Fig. 43), 80 mm diameter 



55.117. Lead Plate on Wood Base together with Hammer and Porcelain Bowl, Figure, 

 for shewing the change in state of the lead plate when placed in liquid air (W. D., 

 4 th Edn., Fig. 408) 



55.118. 2 small Glasses, with Ether and Alcohol, in one cork mount, fitting cylindrical Beaker 

 No. 55,115 (W. D., 4 th Edn., Fig. 409) 



When plunged in liquid air the ether is converted into a crystalline mass: the alcohol first be- 

 comes viscous, solidifying finally into a transparent mass. 



s. d. 

 0. 5. II 



0. 6.0 



0. 8.0 



54,188. Hollow Cube of Crystal Glass, 8 cm side, for demonstrating the attraction of liquid 



air by an electromagnet (W. D., 4 th Edn., p. 615) ................ I 0. 6. 



A suitable Electromagnet to use is No. 62,280. 



55,119. Apparatus for the Liquefaction and Freezing of Oxygen by the aid of liquid air 



(W. D., 4 th Edn., Fig. 410) ........................... 1. 6.0 



Ozone Tubes, for producing solid ozone by means of liquid air (W. D., 4 th Edn., p. 619): sec 

 Section "Electricity", p. 1017. 



55.1-M. Apparatus after Erdmann for Freezing Water in liquid air (Erdmann, Anor. Chcmic. 



Fig. 97) ................................... 0.10.0 



*5:>,iL'3. Apparatus for the Critical Temperature Phenomena, Figure (W. D., Fig. 365 



[345]), with instructions for use, for objective projection ............. 0.0.0 



* .">."). TJ.'Ja. Protecting Case for above of black sheet iron ................. 0. 11'. 



I. Apparatus for the Liquefaction of Sulphurous Acid (W. !>.. Fig. 366 [346]) .... o. 4.0 



:."., I !'.">. Apparatus after Ndack for Liquefying Gases by Pressure and Cooling (Xtschr. z. Fonle- 



rung d. plus. I'.. 1886. p. UOS), simple pattern. Figure ............ 1.13. II 



# t';m be used with the Projection A|>|i;u iitns. 



Cl. 5596, 364, 1S21, 1825. 



