Chemistry and Physics. 415 
by diazonapthalene and a phenolsulphonic acid. Using the fi 
method, and pen sodium a naphtolsulphonate with aniline 
nitrate and p — es the nad color was obtaine ed Bot 
Berl. Chem. Ges., x, 8, July, 18 
9. LKxamination ae a Nickel anid —H. Wir. (Abwtrses 
tion a nickel magnet presented to Kotschubey, Pres ide nt of t 
Russian Technological igs by Jos. Wharton of Philadelphia, 
It had the form of a flat 2mm. thick, 9.5 mm. broad, and 
155 mm. long, pointed at shies ends, and had at its center an apna 
cap for ‘supporting it on a pivot. Its weight was 25 grams, Its 
Pp 
112,000 units, the steel giving 245,000. After ssa i ing, ce 
nickel gave 188 ,000, the steel 368, 000. With wolf m steel, t the 
ent went up to 594 000 in one instance. e nickel was 
Saeed by Butlerow and found to contain only one-third of one 
er cent of i iron, with traces of cobalt. The effect of Ae 
e 
porary magne b ha 
oo and one-fourth of that ack of "ein anicont in soft 
i. Ac. St. Pet., xxiv, 1, May, 1877. 
a etroscope with a Fluorescent Eye-piece.—M. J. 1. Soret 
has pablinad a detailed description of sig sarap se which he 
t n he uses 
either a small plate of uranium agen or a cell fitted with an 
aqueous solution of esculine; and the spectroscope is best con- 
