To Teachers and Parents
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ELEMENTS OF NATURAL PHILOSOPHY,
embracing the general principles OF Mechanics,
Hydrostatics, Hydraulics, PneumatIcs, Acous-
tics, Optics, Electricity, Galyanshl, MaSnet!sm;
and Astronomy Illustrated by yerajhundred
Engravings. BY LEONARD D. GALE, NJ. d., Pro-
fessor of Geology and Mneralogy IN the UNI
versi,y of the City of New-York, and Lecturer
on Chemistry and Natural Philosophy. Price,
full bound 80 cents Ss4 so a dozento Teachers.
The aboy. work in the best schools
aud se.nnaries through different the United States
and considered the best book for learners pf
Gale being himself practical Chemist aud his professional
duties Lecturer requiring him make constant and repeat
ed experiments all branches of Natural Philosophy was
ennenly qualified for the task OF editing such work Most
OF the other publications tie popular branches OF Phloo-
ply and Chemistry compilations uide oy book
Makers hence the lreuru failures OF students Their at
apartments while following the directions contained
III these works No such difficulty will III the use OF
this work OF Dr. Gale.


~ Orders must be accompanied bv the cash aud addressed


to GREELEY * McELRATH. New York.