and the Constitution of the Atom. 251 



about N = 30, but the position of the true experimental curve 

 is somewhat uncertain for higher values of N. 



Table XIII. 



A C£ q A ca j 



N. 8/9 N 2 . 4 obs ft (nunc)- 12. q 3 (m**.)=t 



11 107'S ... - 34-8 - 34-8 



12 1280 - 31'8 - 39-0 - 39'0 



13 150-2 - 361 - 43-0 - 430 



14 174-2 - 39-4 - 47-1 - 471 



15 200-0 - 43-1 - 51-0 - 51'0 



16 227-6 - 460 - 54-8 - 54'8 



17 256-9 - 49-5 - 58-3 - 58'3 



18 288-0 ... - 61-5 - 61-5 



19 230-9 - 567 - 646 - 65'4 



20 2556 - 59-8 - 677 - 69-2 



21 3920 - 640 - 70-3 - 73-0 



22 430-2 - 670 - 727 - 76-7 



23 470-2 - 70-7 - 76'3 - 80'4 



24 512-0 - 73-7 - 79-6 - 83-9 



25 5556 - 765 - 82-9 - 87'4 



26 6009 - 79-6 - 86-0 - 90'7 



27 648-0 - 83-1 - 89-0 - 94'0 



28 696-9 - 88-2 - 92-0 - 97'2 



29 747-6 - 92-5 - 94'8 -100-2 



30 800-0 - 95-8 - 977 -103*4 

 40 1422-2 -129-3 -116-7 -124-4 

 50 2222-2 -113-2 -1125 -122-3 

 60 3200-0 - 790 - 710 - 82"9 



We thus see that both curves (II. and III.) run very nenr 

 to the experimental curve IV., and they give a much better 

 agreement than the curve of Debye. 



The curve II. runs nearest to the experimental curve ; 

 but still — if we stick to the hypothesis of recombination 

 between primaries with conservation of momentum — the 

 assumption of 12 electrons in a single M-ring must be 

 given up, because for small atomic numbers, owing to 

 the change of ^3, the curve II. has a peculiar bend which is 

 not at all indicated in the experimental curve. 



Passing from low atomic numbers, the distance between 



