190 MEMOIR OF DR. DALTON, AND 



two parts of lime require five parts of muriatic acid for solu- 

 tion, six parts of lime will require fifteen of the same acid. 



Experience 6. P. IM. 



" When two neutral solutions are mixed, and a decomposi- 

 tion follows, the new resulting products are almost without 

 exception neutral also, but if the solutions of one or both are 

 not neutral before mixing, the products after mixture are also 

 not neutral. 



Corollary 1. 



" The elements must therefore have amongst themselves a 

 certain fixed proportion of mass. To determine which, their 

 neutral compounds generally give the best opportunity.* 



Corollary 2. 



" If the weights of the masses of two neutral compounds 

 which decompose each other are A and B, and the mass of 

 the one element in A is a, and that of the one in B is b, then 

 the masses of the elements in A are A — a, a and those in B 

 are B — J, h. The proportions of the masses of the elements 

 in the neutral compounds before decomposition are A — a : a 

 and B — h : h ; but after decomposition the new products are 

 fl5_j_B — J, and 6+ A — a, and the proportion of the masses of 

 the elements is a : B — 6, h : A — a. If the proportion of the 

 masses in the compounds A and B is known, that in the new 

 products is known also. 



* In German " Der Stoff ihrer neutralerVerbindungen ofterseinen Bestimm- 

 ungsgrund abgeben kann." StofF is explained thus : Einleiting : Erklarung 

 14. " Das materielle oder korperliche Subjekt, worinnen sich die chymische 

 Verwandtschaft befindet, nenne ich die Masse, Prinzip oder Stoff (Massa) des 

 Elementes. Die Summa der Massen der Elemente, so eine neutrale auflosung 

 bilden, ist die Masse oder Stoff (Massa) der neutralen Auflosung." 



That is, "I call the material or corporal suhjectum in which the chemical 

 affinity resides, the Mass, Principle or StuiF (Massa)." 



In a note, he says, — " There is present in the Element a certain suhjectum 

 to which the chemical attractive power or the affinity is bound, this is the Mass 

 of the Element." 



