816 Dr« Gladstone on the Heiations between the 



find no recurrence of certain numbers, or other peculiarity, suf- 

 ficiently striking to warrant us in drawing any inference ; but 

 let us arrange the elements according to their chemical relations, 

 and the case will be entirely altered. Any arrangement of the 

 elements is attended with difficulty : I shall not attempt to form 

 one of my own, as it would be open to the objection that my 

 mind had been biassed by dwelling upon the numerical relations ; 

 but I shall adopt that given in Gmelin's Handbook of Chemistry 

 at the commencement of vol. ii. 



N H 



F CI Br I LNaK ;' 



S SeTe Mg Ca Sr Bft^^, , J 



P As Sb G Er Y Tr Ce Di La rrV-^J 



CBSi ZrThAl '« 



. .. . . . Ti Ta Nb Pe W Sn Cd Zn ^^^ ^ 



i.. H . Mo V Cr U Mn Co Ni Ee.. . . .oiO ynr^ 



Bi Pb Ag Hg Cu bcroo98 sdi oi sA 



OsRu It ;;R PtPd Au 7" 



Even here many elements are grouped together which have 

 but a faint chemical resemblance. Thus tin has little in common 

 with cadmium and zinc, or mercury with copper ; fluorine is very 

 different from the other halogens ; magnesium can scarcely rank 

 with the metals of the alkaline earths; whilst late researches 

 have shown the strict isomorphism of chromium with piangaueee 

 or iron. ; i^ jr,. 



If we substitute the equivalent numbers in this arrangement, 

 the slightest glance will make us acquainted with many remark- 

 able resemblances. Decimals are omitted for the sake of brevity. 

 8 14 1 . 



19, 35, 80, 127 6, 23, 39 ^b 



16,39, 64 12,20,44,68 



31, 75, 129 5, — , — , — , 47, 50, 47 



6,11,21 22,60,14 



25, 184, — , — , 92 58, 56, 33 



46, 69, 27 60, 28, 29, 30, 28 



208,104, 108, 100,32 

 100,52,99, 52, 99,53,197. 



Looking more closely into this an'angement of numbers, we 

 shall find the observation of Berzelius borne out in every instance, 

 but one, of a well-defined chemical group. 



