112 Rev. J. B. Emtnett on the [Feb. 



only in decimals, without the means of knowing which are the 

 true values. 



All chemists agree in the atomic number of carbon, but its 

 specific gravity is unknown : that of different charcoals is very 

 various ; I have, therefore, calculated the diameter of the atom 

 of carbon from the greatest and least gravity of wood charcoal. 

 The diamond might be substituted, but since it has never been 

 proved to be the pure carbonaceous element, such substitution 

 would be premature. 



In the following table, I have calculated the forces of attrac- 

 tion {F} by formula (e) ; F = D . S. 1 give the numbers as 

 they result from the multiplication, &c. of the different tables 

 now in use ; when the same can be extended to gaseous and 

 liquid bodies, oxygen or hydrogen may be made the unit in all 

 tables. 



Atomic weight. 



Gold, F =97-2527 24-838 



Gold 78-3773 *12-9 



SUver 62-6365 *13-3 



Silver 66-5805 26-88 



Copper 39-5736 ^8-00 



.Copper 31-2928 4-00 



Iron 34-6054 *6-85 



Iron 27-4634 3-45 



Lead 



Lead 



Tin 



Tin 



Zinc 



Zinc 



Phosphorus . . . 

 Phosphorus . . . 



Sulphur 



Carbon 1-556 0-223Sp.gr. 



Carbon 1-545 1*5 1 6 Sp. gr. 



On the second supposition; i.e. that the density remaining 

 the same, the weight of a particle of matter is as the cube of its 

 diameter, F will be proportional to the specific gravity of each 

 solid. 



In these tables, the numbers marked with an asterisk are from 

 the same tables as those of the gases and compounds in 

 Table 4. 



From this table, the most inflammable solids appear to have 

 the least force, or the least tendency to the earth. The order 

 (taking the numbers marked with the asterisk, and which seem 

 generally very consistent), is carbon, phosphorus, sulphur, zinc, 



