344 



LABORATORY GUIDE IN PHYSIOLOGY. 



FIG. 18. 



FIG. 19. 



18. STILL. For making distilled water. 



19. SUPPORT. Special pattern for physiology, with extra heavy 

 base length 50-75 cm., weight 2% Ko.-4^ Ko. 



FIG. 20. 



20. DRYING OVEN, with double wall 10 in. by 12 in. May be used 

 for incubator in experiments in digestion. 



