No. 55 115. 



Liquefaction of Air. 



611 



55106. 1:10. 55113. 1:10. 



J 



55 103 a. 1:7. 



55103b. 1:6. 55115A. 1:8. 55115B. 1:6. 



Cylindrical Beakers with Evacuated Double Wall after Dewar, 

 liquid air, liquid hydrogen, etc., silvered inside. 



Figure, for keeping cool 



Flasks with evacuated Double Wall, silvered inside, for the same purpose, Figure. 



List No. 55,109 55,110 55,111 55,112 55,113 55,114 



Capacity, approx. ccm 150 300 500 750 1000 2000 



(a) Beaker 0. 3. 0. 3. 6 0. 4. 6 0. 6. 0. 8. 0. 16. 



(b) Polished Wood Bases for same 0. 1. 6 0. 1. 9 0. 2. 0. 2. 3 0. 2. 6 0. 3. 



55,115. Cylindrical Beaker after Weinhold, Figs. A & B, for storing liquid air, liquid hydro- 

 gen etc. (W. D. 4 th Edn. Fig. 407; Erdmann Anor. Chemie, Figs. 42 and 94), with 

 evacuated quadruple wall and side tube on neck ; internal height 180 mm, internal width 

 35 mm, with base 1. 8. 



Cl. 1827, 1826, 

 6556, 6557, 1828, 5566. 



39* 



