Chemistry and Physics. 115 
ane, orsome still more reine apparatus, will help us in some 
way to bridge the chasm Afteen and twelve thousand 
hour candle lights from a pound ‘of coal. — Scienti ce American. 
na new ‘ae 0 namo-magnetic Machine ; by Wi- 
s now thirty-six i ars since Farada 
lectricity and Mag- 
netism;’ the foundation then laid has been receiving additional 
strength as the superstructure has progressed. Faraday ha gone 
to his rest, but the name he always tried to hide behind his phil- 
osophy will shine brighter and brighter, until the top stone is raised 
in future ages. e machine I am about to describe is a part o 
ge how far this machine meets, not Bed that re- 
ement, but also Bes of lighthouse illuminati ion. 
Per 
ure, 
ing a coil of copper wire, the terminals of which are Sonieeed 
wih the wire surro unding t the ele ctro-magnet ; and although great 
effects were produced in the electro-magnet, the current itself could 
latter ese it to its normal co Sindy n. But in the machine 
have constructed, the power of the Sern nneras is kept ae ay ae 
& separate current, to be applied to any u soee can 
of the smaller armature, ae bk each eae of polarity i in Pm 
armature will auement the macnetism. eg the machine is fi 
made it is only requisite to pass a curre’ t froma small vali cot 
i ae 
“If the armature in connection with the electro-magnet is made — 
to rotate, there will be a very feeble current generated in it; this 
od Fadil ae siddcoemagtot, will ineenas J power with 
