On the Light emitted ly Silver, ^c. 67 



fectly warrantable, as the words pro, dezi, alone answer every 

 purpose. 



In the terminations of the acids I have adopted Des- 

 mond's orthography. See his Translation of Fourcroy's 

 Chemical Philosophv. 



Most of the absurdities of. the present nomenclature will 

 be evident on inspecting the above plan ; which I have giveti 

 in this detailed way, that the three modes may be better con- 

 trasted. 



To Dr. Thomson we are indebted for the nomenclature 

 of the oxides; and E. 13. 's ingenious nomenclature of the 

 sails suggested the plan, which, with the utmost deference, 

 1 now submit. Your most obedient servant, 



JLondon, Junei;3. A. X 



X. On the Light emitted lij Silver in a Slate of Coinbustion. 



3, Princes- street, Cavendish-square, 

 June 25. 



To Mr. Tilloc.h. 



TSIR, 

 HE snigiilarity of the following circumstance (observed 

 \vhen preparing for a public lecture) induces me to believe 

 that its communication-will be acceptable to many readers of 

 your valuable publication. Should you entertain the same 

 opinion, its insertion in the Philosophical Magazine will 

 much oblige yours respectfulTy, 



G. J. Singer. 

 When the brilliant experiments of the deflagration of 

 metals by the Voltaic battery were first published, it was 

 observed, that silver burned with a bright emerald green 

 light ; and this observation has been repeated by most°sub- 

 sequent writers and experimentalists. In the lectures re- 

 cently delivered at the Royal Institution, when this experi- 

 ment was repeated, the green flame did not appear, the de- 

 flagration of silver leaf being attended by the emission of a 

 brilliant white light. Mr. Davy attributed this to the great 

 purity of the silver employed ; and conjectured, that thegneen 

 flame usually observed, arose from the admixture of copper 

 -^ - with 



