64 



OSMOTIC PRESSURE OF AQUEOUS SOLUTIONS. 



To relay 



Fig. 32. — 60-liter galvanized-iron bath for intermittent use. 



(a) and (b) wooden base; (c) hair padding; (d) water-tight inelosure for electric stove (lamp); 

 (e) electric stove; (/) and (g) removable base for lamp; (h) frame for lamp; (i) supports for 

 circulating system; (j) coil of block-tin pipe for the circulation of cold or hot water (shown 

 better in Figure 32, B) ; (k) and (I) pipes by which water enters and leaves the circulating 

 system (j) ; (ra) and (n) cylinder open at top and resting on pegs between coils of (j) ; (o) holes 

 for escape of gas expelled from water; (p) holes for escape of water into outer bath; (r) pro- 

 peller for pumping water over heated chamber (rf); (s) pulley; (0 oil cup; (u) thermostat; 

 (v) thermometer; (w) adjustable iron frame for fixing the propeller in place; (x) vertical pipe 

 leading to pressure regulator. 



A. Adjustable support for bottles, etc. B. Block-tin circulating system (j in Figure 32). 



C. Constant-pressure arrangement, (ad) Stand-pipe; (bd) overflow; (cd) stopcock for the regu- 

 lation of flow of water through circulating system in bath; (dd) entrance place of water-supply. 



