PYROMETERS,
For showing heat of Ovens, Hot Blast Pipes, Boiler Flues, Super-Heated
Steam, Oil Stills, &c.
HENRY W. BULKLEY. Sole Manufacturer,
149 Broadway, New York.
$5 Outfit free. Salary guaranteed. Write at once to
EMPIRE NOVELTY CO., 309 Broadway, New York.
TAYLOR'S M'F'G CO., WESTMINSTER, MD., Portable and Stationary Engine
Builders, etc. Send for Cata.
Scientific American, Vol. XXXVII.—No. 2. [New Series.], July 14, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 178 / 213 题