36 Mr. William Sutherland on the 



Table XXYIII. 



Li. Na. K. Eb. Cs. Be. Mg. Oa. Sr. Ba. 

 ¥/n 24 3-5 4-6 6-0 7 '3 21 27 32 37 4-2 



B/rc 2 7-4 18-6 34'4 56 -5 28 43 53 83 



P. As. Sb. Bi. C. Si. Ti. Sn. 



F/n -8 -85 105 1-5 5 -6 '95 -95 



B/n 8-3 8-7 97 ... 2-7 75 8-5 100 



A glance at the numbers for the Li and Be families of 

 metals shows that the ratio of B to F is not constant, as we 

 found to be approximately the case with non-metallic atoms 

 and radicals ; but when we get to the families which are half 

 non-metallic and half metallic, as in the P family and the 

 family, we see that the ratio, except in the case of C itself, is 

 not far from 10, the value which we have hitherto found for 

 non-metallic atoms and radicals. For further assurance as 

 to the reality of this distinction between metals and non- 

 metals, the best course will be to determine values of M 2 l for 

 the uncombined metals. 



3. Determination ofW 2 lfor the Uncombined Elements. 



Data are available for both methods of calculating M 2 /, and 

 that of the Kinetic Theory of Solids will be taken first as 

 being applicable to a greater number of substances. At first 

 the molecular mass will be regarded as unknown, and for M 

 the usual atomic weight will be used in equation (9). The 

 following table contains the values of T the melting-point 

 and of M/p from L. Meyer's i Modern Theories of Chemistry/ 

 and the values of M 2 / [not (M 2 /) 5 ] calculated from them by 

 equation (9), as well as the values of the ratio (M/p)/M 2 Z 

 [not (M/p)/(M 2 /)*j . Equation (9) applies strictly only to the 

 metals, but in a formal manner it is here extended to some 

 non-metals. 



Table XXIX. 



First family and Copper subfamily. 



Li. Na. K. Eb. Os. Cu. Ag. Au. 



T 453 369 335 311 300 1330 1230 13L0 



M/p 11-9 23-7 45-4 561 706 7*2 10-2 10-2 



MH 41 8-6 16-2 21-2 276 111 15-9 187 



{M.!p)IWl ... 2-9 2-8 2-8 2-6 26 -65 -64 -55 



Second family and Zinc subfamily. 



Be. Mg. Ca. Sr. Ba. Zn. Cd. Hg. 



T 1230 1023 900 800 748 690 590 234 



M/p 5-6 13-8 25-4 34-9 36-5 91 129 147 



Wl 5-8 139 24-5 340 359 7*3 9-7 4-8 



(M/p)/M 2 /... 1-0 1-0 10 1-0 1-0 1-25 133 3-0 



