no Teachers and Parents.
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ELEMENTS OF NATURAL PHILOSOPHY,
embracing the general principles OF Mechanics,
Hydros,a,ics. Hydraulics, Pneumatics, Acous-
tIcs Optics, Electricity, Galvanism, Magnetism,
and Astronomy. Illustrated by several hundred
Engravings. BY LEONARD D. GALE, NJ D., Pro.
fessor OF Geology and Mineralogy IN the Uni
versty OF the City OF Ncw-YorFk, and Lecturer
on Chemistry and Natural Philosophy Price
full bound, 80 cents; 81 5Oa dozen TO Teacher
Tn. above work is extensively t
and seninaries thro Chou different ft- Un,f-
and best book --rs
Gae being himself PRACTICAL Chemist aad his
duiie Lecturer requiring him make and
eI experiment all branches of Natural Philosophy,
srnl-ntly qualified for the task OF edn. such Mos
other publications. the popula: branches OF Phoso
phy aud Chemistry mer- eomratIous made by book
makers, hence the ire!uTn; lures Of students their
t-mpt experiments while following the
these works. No such difficulty will occur IL The US.
this work of Dr.. Gale.


Orders be accompanied bv the cssi and slre.,C


to GREELEY MCELRATH, New York.