10 TEACHERS AND PARENTS.
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ELEMENTS OF NATURAL PHILOSOPHY-Embra.
II cing the general principles Of Mechanics
Hydraulics, Pneumatics Acoustics, Optics. Electricity
Gaganlsm Magnetism, and Astronomy, illustrated BY sew
ea hundred euyrayngs aesgred for the use of Schools
and Academies-By L. LEONARD GALE, n. ID.
Professor OF Geology AID Hneraogy in the University Of
the city o: New iork. and Lecturer on Chymstry and
Natural Philossphy-l vol l2 mo.


The above work on Natural Philosophy is extensively
used academies and schools and decided
appreciation Of teachers wherever is known Dr. Gale
practical man. and many Of illustrations given
this are from experiments actually made by author him
se 81 nat neither teacher student subjected TO
the modification Of such failures experiments,
are constantly Occurring the of books prepared By
mere comPers, WHO themselves ignorant Of the sub
upon WINCH they pretend write for the insruc on
of others


This work ia neatly printed and Substantially bound
and s sold at the low rate OF s9 per dozen Teachers
about forming classes the study s Ssral Philosophy
and parents who feel interested having proper eleeu-
tary books placed IL the hands of their children
requested 10 examine for ,hemseves. Published and
sold by COLLINS, KEESE& & co.


OILS I'm 2G Pesrl-street New. York.