8 



ESSENTIALS OF CHEMICAL PHYSIOLOGY 



point is 0°, and the boiling-point 80°. In scientific work the Centigrade 

 scale has almost completely taken the place of these ; in this system the 

 freezing-point is 0°, and the boiling-point 100°. 



To convert degrees Fahrenheit into degrees Centigrade, subtract 32 and 

 multiply by f , or C = (F - 32) f. Conversely, degrees Centigrade may be con- 

 verted into degrees Fahrenheit by the following formula : F = |C + 32. 



TENSION OF AQUEOUS VAPOUE IN MILLIMETEES OF 

 MERCURY FROM 10° TO 25° C. 



10°. 9-126 



11°. 9-751 



12°. 10-421 



13°. 11-130 



14°. 11-882 

 15°. 12-677 

 16°. 13.519 

 17°. 14-409 



18°. 15-351 

 19°. 16-845 

 20°. 17-396 

 21°. 18-505 



22°. 19-675 

 23°. 20-909 

 24°. 22-211 

 25°. 23-582 



TABLE OF THE DENSITY OF WATER AT TEMPERATURES 

 BETWEEN 0° AND 30° C. 



0°. 0-99988 

 1°. 0-99993 

 2". 0-99997 

 3°. 0-99999 

 4°. 1-00000 

 5°. 0-99999 

 6°. 0-99997 

 7°. 0-99994 



8°. 0-99988 

 9°. 0-99982 

 10°. 0-99974 

 11°. 0-99965 

 12°. 0-99955 

 13°. 0-99942 

 14°. 0-99930 

 15=. 0-99915 



16°. 0-99900 

 17°. 0-99884 

 18°. 0-99866 

 19°. 0-99847 

 20°. 0-99827 

 21°. 0-99806 

 22°. 0-99785 

 23°. 0-99762 



24°. 0-99738 

 25°. 0-99714 

 26°. 0-99689 

 27°. 0-99662 

 28°. 0-99635 

 29°. 0-99607 

 30°. 0-99579 



.SYMBOLS AND ATOMIC WEIGHTS OF THE PRINCIPAL 

 ELEMENTS 



