Steel Castings

From ¼ to 15,000 lb. weight, true to pattern, of unequaled strength,

toughness, and durability. 15,000 Crank Shafts and 10,000 Gear Wheels of

this steel now running prove its superiority over other Steel Castings.

Send for circular and price list.

Chester Steel Castings Co., 407 Library St., Phila, Pa.

* * * * *

Pyrometers.

For showing heat of Ovens, Hot Blast Pipes, Boiler Flues Superheated

Steam, Oil Stills, etc.

HENRY W. BULKLEY, Sole Manufacturer, 149 Broadway, N.Y.

* * * * *

WM. A. HARRIS PROVIDENCE, R. J. (PARK STREET), Six minutes walk West

from station.

Original and Only builder of the HARRIS-CORLISS ENGINE With Harris'

Patented Improvements, from 10 to 1,000 H. P.

* * * * *

Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 157 / 165 题