=The CHEAPEST AND BEST in the market. Send for descriptive circular
and price list.=
=H. B. BIGELOW & CO.,
New Haven, Conn.=
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[Illustration: Diamonds and Carbon]
Shaped or Crude, furnished and set for Boring Rocks, Dressing Mill
Burrs, Emery Wheels, Grindstones, Hardened Steel, Calender Rollers,
and for Sawing Turning, or Working Stone and other hard substances:
also Glaziers' Diamonds. J. DICKINSON, 64 Nassau St., N. Y.
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=SECOND-HAND ENGINES,=
Portable and Stationary, at Low Prices.
HARRIS IRON WORKS, TITUSVILLE, PA.
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HOW TO MAKE A PHONOGRAPH.
Full Instructions, with Eight Working Drawings, Half Size.
Construction easy and Inexpensive. These drawings are from an actual
working Phonograph; they show the sizes, forms, and arrangement of
all the parts. The explanations are so plain and practical as to
enable any intelligent person to construct and put a Phonograph in
successful operation in a very short time. Contained in SCIENTIFIC
AMERICAN SUPPLEMENT NO. =133.= Price 10 cents. To be had at this
office and of all newsdealers.
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[Illustration:
SCHLENKERS AUTOMATIC REVOLVING BOLT CUTTER
DIAMOND SELF CLAMP PAPER CUTTER
HOWARD'S SAFETY ELEVATORS
HOWARD'S PARALLEL VISE
HOWARD IRON WORKS BUFFALO N. Y.
]
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=_PERFECT_=
=NEWSPAPER FILE=
The Koch Patent File, for preserving newspapers, magazines, and
pamphlets, has been recently improved and price reduced. Subscribers
to the SCIENTIFIC AMERICAN and SCIENTIFIC AMERICAN SUPPLEMENT can be
supplied for the low price of $1.50 by mail, or $1.25 at the office
of this paper. Heavy board sides; inscription "SCIENTIFIC AMERICAN,"
in gilt. Necessary for every one who wishes to preserve the paper.
Address
=MUNN & CO.,
Publishers SCIENTIFIC AMERICAN.=
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THE TANITE CO.,
STROUDSBURG, PA.
=EMERY WHEELS AND GRINDERS.=
GEO. PLACE, 121 Chambers St., New York Agent.
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[Illustration:
ROCK DRILLING MACHINES
AND
AIR COMPRESSORS.