Mr. Laming ofi the primary Forces of Electricity. 333 



4 (C20 Hi3 Og) + Ag O contains 14*417 per cent, of oxide. 



4. A third portion separately prepared, which was brown 

 when precipitated, but had become black, gave 26*888 of 

 oxide of silver. 



2 (CgoHia 03) + AgO contains 26*715 of oxide of silver. 



We may conclude therefore that this acid forms different 

 classes of salts with the same base, which possess different de- 

 grees of solubility ; the conditions necessary to ensure the 

 constant production of the same compound, and the determi- 

 nation of which are the neutral and which the acid or basic 

 salts, will require further investigation. 



Durham, June, 1838. 



XLV. On the primary Forces of Electricity . By 

 Richard Laming, Esq.^ M.R.C.SJ^ 



[Continued from p. 54,] 

 Part 11. 

 66. TT may be useful before we proceed to consider the 

 -B- origin and propagation of induction among the atoms 

 of contiguous bodies, to recapitulate some of the chief parti- 

 culars in the new theory which are thought to be established 

 as facts in the preceding part of this paper. 



1st. The attraction which is reciprocal between electricity 

 and common matter is definite with regard to quantity 

 as well as force ; no kind of matter ever attracting either 

 more or less of electricity than the quantity which con- 

 stitutes its natural equivalent (3.). 

 2ud. Besides the above force, designated the major elec- 

 trical attraction, there is a second by which the atoms of 

 electricity are associated together; and this we have 

 called the minor electrical attraction (IS.)* 

 3rd. The minor electrical attraction is the alone cause of 



bodies becoming plus or positively electrical (16.). 

 4th. Electrical induction is immediately dependent on the 



definite nature of the major electrical attraction (7.). 

 5th. The electrical condition of a body under induction 

 virtually or really compensates the opposite electrical 

 state of the inducing body (11.). 

 6th. Induction, and consequently compensation, in all cases 

 precede the sensible locomotion of matter caused by the 

 action of the major electrical attraction ; whether it be 



* Communicated by the Author. — Erratum, p. 45. Art. 34, eighth line, 

 for " as the densities of the air directly," read '* as the densities of the air 

 inversely." 



