610 



Heat and Change of State. 



No. 55 098 - 



55 098. 1 : 8. 



55 103. 1 : 7,5. 



55,098. Demonstration Apparatus for Generating Liquid 7 Air after Heylandt (Ztschr. . d. phys. 

 u. chem. U., 22, 1909, p. 360), Figure...* 



55.099. Steel Cylinder containing Compressed Air for above 



55.100. Auxiliary Apparatus for Generating Solid Air . . 



55.101. Refrigeration Thermometer 



55.102. Pressure Gauge for valve-regulation 



a s. 

 6.10. 



2. u. 

 1.10. 



i. o. 



1. 4. 



d. 



(I 



55,103. Demonstration Apparatus for Generating Liquid Air after Olszevski, Figure (Drudes 

 Annalen der Physik, 10, 1903, p. 776) 



31. n.(t 



It is possible to make in a few minutes with this apparatus and the aid of two cylinders of com- 

 pressed air of 13 litres capacity, 100 ccm of liquid air. 



Steel Cylinders: see No. 55,099. 



If a compressor of at least 7 HP. is used instead of the steel cylinders it is possible to produce 

 about 600 ccm of liquid air per hour with the apparatus. Prices of compressors quoted on'application. 



55,103 a. Apparatus for the Liquefaction of Air and Hydrogen in large quantities, Figure, 

 after Olszevski, for use with steel cylinders or with a compressor; with spare glass 

 reservoirs 



Generates about 1 litre compressed air per hour with a 7 HP compressor and about 3 litres with 

 a 19 HP compressor. 



55, 103 b. Apparatus for the Liquefaction of Air in large quantities, Figure, entirely of 

 metal in wood casing 



The output is the same as with No. 55, 103 a. 



55, 103 c. Plate of Sketches for Explaining Linde's Counter-current Machine (M. T., S 68) . 



Liquid air can be obtained ready for use, ci. 6-213, 



immediately before using, from the suppliers. 



70. 



,->.-,. (i. 

 0. 3. 



6555. 





