112 APPENDIX. 
a law which agrees very well with the results ae 
experiment when some atomic weights, as for in- 
stance those of hydrogen, nitrogen, and chlorine ~ 
are halvyed,—while others, as that of carbon, are 
doubled. According to this theory, the zero of 
temperature is only 480° below the freezing 
point, indicating that the momentum of the re- 
volving atmospheres of electricity in a fb. of 
water at the freezing point, is equal to a mechani- 
cal force capable of raising a weight of about 
400,000 fbs. to the height of one foot. 
February 20, 1844. J POs 
