No. VIII.] 



APPENDIX. 



181 



TABLE OP PRECIPITATES WITH THE RED FERROCYANATE 

 OP POTASSA. 



Gold . . 

 Platina . 

 Palladium 



Silver . 



Nickel 

 Copper 



Mercury 



Bismuth 

 Tin. . 



Iron 



Antimony < 



Cobalt . 

 Zinc . . 

 Cadmium 

 Curanium 

 Lead . . 

 Alumina . 



Baryta . I 



Strontia . 

 Lime . 



chloride . . 

 chloride . . 

 nitrate . . . 

 nitrate . . . 

 sulphate . . 

 acetate . . . 

 nitrate . . . 

 sulphate . . 

 ammoniuret . 

 protonitrate . 

 bichloride . . 

 nitrate . . . 

 protochloride 

 protosulphate 

 persulphate . 

 potassio- 

 tartrate . 

 chloride . 

 chloride . 

 sulphate . 

 sulphate . 

 nitrate . . 

 acetate . . 

 acetate . . 

 muriate . 

 nitrate . . 

 nitrate . . 

 muriate 



solution darker, no precipitate. 



solution darker, small crystals deposited. 



red-brown precipitate. 



deep orange. 



red brown. 



yellow brown. 



deep-greenish brown. 



at first yellow brown, then white, then green. 



none. 



pale yellow brown. 



white, gelatinous. 



Prussian blue. 



none, with iodide, potassium, Prussian blue. 



none. 



sepia. 



chocolate brown. 



buff. 



pale yellow. 



deep red brown. 



solution brownish, none. 



none. 



none. 



none, 

 none. 



No. VIII. 

 ELEMENTS OF ELECTRO-METALLURGY. By ALFRED SMEE. 



THE ' Elements of Electro-Metallurgy ' was first issued to the public on 

 the 26th December, 1840. The first edition was speedily sold off, and 

 the second edition appeared at first in parts, thus : the first forty pages 

 appeared on the 1st April, 1842; forty pages more were ready on the 

 1st May ; the third forty on the 1st July ; the succeeding forty on the 

 1st August; the fifth part, containing forty-four pages, was published 

 1st September ; the sixth part, to the 236th page, on the 1st October ; the 

 next forty pages on the 1st November, and the remainder on the 1st of 

 December, when all the parts were published in one volume. 



During these two years (1840 to 1842) Alfred Smee had prosecuted his 

 labours in this branch of knowledge to such an extent that the second 

 edition of the ' Elements of Electro-Metallurgy ' bore rather the feature 

 of a new treatise than of a second edition ; for the work had been doubled 

 in bulk and partly re-written. 



