440 THE POPULAR SCIENCE MONTHLY. 



1 per cent, solution, 0259 copper. 



2 " " 078 " 

 4 " " 224 " 



In fact, it has been found that, in solutions not exceeding five per 

 cent., twice the amount of nitrate of silver dissolved in water gives 

 three times the amount of chemical action ; and this is true with other 

 metals also in weak solution. It may be that this is not the precise 

 expression of a physical law, but it agrees at least closely with the 

 results of experiment. 



The power arising from this action of two metals on a binary liquid 

 may be carried to a distance and produce similar decompositions there. 

 This is ordinary electrolysis. Metals have often been crystallized from 

 their solutions in this way, and I have seen excellent preparations of 

 crystalline silver, gold, tin, copper, platinum, etc., by using poles of the 

 same metal as that intended to be deposited upon them. The forms 

 thus obtained are precisely analogous to those produced by the simple 

 immersion of one metal into a soluble salt of another, and illustrate 

 still further the essential unity of the force that originates the two 

 classes of phenomena. 



-♦♦♦- 



HEKBEET SPENCEE BEFOEE THE ENGLISH COPY- 

 EIGHT COMMISSION.' 



II. 



QUESTION [Chairman). I will ask you if you have any explana- 

 tions you wish to offer on any point connected with the evidence 

 which you gave on the last occasion ? 



Answer. Yes ; I have to rectify some misapprehensions. From the 

 restatement made by Mr. Farrar, it would appear that, in discussing the 

 question of profits from republication of one of my works, I said I had 

 "found that no other publisher would undertake the work without an 

 additional profit of ten per cent.," which implies that I had endeavored 

 to obtain another publisher. My meaning was, that I ascertained that 

 any other publisher who thought of issuing a rival edition would expect 

 to make a profit of ten per cent, beyond the ten per cent, commission 

 for doing the business. Further, I have to remark that the case I took 

 as illustrating the improbability that I should obtain any considerable 

 compensation from increased sales under the royalty system was the. 

 case of one of my works only, the " Principles of Psychology," and in 

 respect of this I may admit that there would be little danger of a rival 



1 March 20, 1^1 : Lord John Manners, M. P., in the chair. Present, Sir Henry T. 

 Holland, Sir Louis Mallet, Dr. William Smith, Anthony Trollope ; J. Leybourn Goddard, 

 Esq., Secretary. 



