260 Scientific Intelligence. 
ignites the jet. The spark from the. wires alone is not generally 
sufficient to ignite the jet, and I have therefore a small electro- 
magnet concealed within the cover or cap of the jar, and covere 
well with cement, to protect it from the action of the acid.» 
A — of the magnet in the cover is shown 
fi 
? 2 
z. 8 | _ om 
When the battery is first started, to prevent ex- 
plosion, it is necessary to take the precaution to bend the;wires 
so that the spark may not ignite the jet until the hydrogen comes 
off nearly pure. 
in 
SCIENTIFIC INTELLIGENCE. 
I. CuEmistry anp Puysics. 
1. New varieties of Narcotin—Werrurim has discovered that 
opium contains two new alkaloids homologous with narcotin. Of these 
the first by the action of potash lime yields methylamin, the second 
ethylamin, and the third propylamin. The formulas of the three bases 
are C44 23NQO14, CasHos 14 and CasH27NO14, and the author 
designates them, methyl-narcotin, ethyl-narcotin and propyl-narcotii. 
reated with sulphuric acid and peroxyd of manganese all three bases 
pylamin actually contains this base in considerable quantity and that 
the latter may be readily obtained by distilling the brine with a solution 
of caustic potash.— Journal Sir praktische Chemie, \iii, 431. °.  — 
» Lquivalent of Phosphorus.—Scurorrer has determined the equiv’ 
pt of phosphorus by burning amorphous phosphorus in oxygen gas 
sequently too high.—Journal fier praktische Chemie, lili, 439. 
atassi 
4. Constitution of Human Fat.—Hetrz has published an elaborate 
at. The 
and important memoir on the composition of human fat. ‘The conel 
sions to which he has arrived are stated as follows : 
