Astronomical Notes

Observatory of Vassab College

Determination of Stress-Bowstring Girder

Cement for Wooden Baths

Combined Engine and Clay Mill

The Bourdon Pressure Gauge

Rack Railway Locomotive

The Ice Boat Whiff

The New Bridge at Pittsburgh

New Holtz Electrical Machine

The Edson Recording Steam Gauge

Pipes for gas and other Purposes

On Welding

Inventions of the Century

Abstract of a lecture by Prof. Pliny E. CHASE, before the Franklin Institute, March 6, 1877

Lubrication

A New Respirator for Firemen

Mordanting Cotton for Aniline Dyes

Plan for Fireproof Flooring

Mine Ventilator

Iron and Steel

Size of Hydrogen Atoms

Solid Steel Castings

Barnyard Manure

Birds in Gardens

Sussex Cattle

Preservation of Fodder

Corn Stover and Hay

Cotton Seed as Manure

Manurial Substances

Horticultural Notes

The Tulip Tree

Value of the Dung of a Cow

Photographic Reproduction of Bank Notes

Photography in Lace Factories

Substitute for Glass in Dry Plates

Weakening Opaque Negatives

Photo Hints