Combination of the Elements and their Atomic Weights. 45 



be unknown; but I have not been able to find any account of 

 such a relation, and therefore venture to send it for publica- 

 tion, as it seems to be of some interest. 



I append a list of the elements plotted on the curves. 



List of Elements in the Chlorine Curve. 



Name. Atomic weight, 



(i) (br) Hydrogen .... 1 



(i) (br) Lithium 7 



— (br) Boron 11 



(i) (br) Oxygen 16 



(i) (br) Sodium 23 



(i) (br) Magnesium .... 24 



(i) (br) Aluminium . . . . 27 



(i) (br) Silicon 28 



(i) (br) Phosphorus .... 31 



(i) (br) Chlorine 35*5 



(i) (br) Potassium . . . . 39 



(i) (br) Calcium 40 



(i) (br) Manganese .... 55 



(i) (br) Iron 56 



(i) (br) Nickel 59 



(i) (br) Copper 63 



(i) (br) Zinc 65 



(i) (br) Arsenic ..... 75 



(br) (i) Bromine 80 



(br) (i) Strontium .... 87 



— ' (i) Palladium .... 106 



(br) (i) Silver 108 



(br) (i) Cadmium .... 112 



Tin 118 



(br) (i) Iodine 127 



(br) (i) Barium 137 



(br) (i) Gold 196 



(br) (i) Mercury 200 



(br) (i) Thallium 204 



(br) (i) Lead 207 



Those marked (i) appear in the Iodine curve, those marked (br) in 

 the Bromine curve. 



I am, Gentlemen, 



Your obedient servant, 

 Cambridge (Caius College Laboratory), A. P. LAURIE 



November 1882. 



