Bachmann's Steam Drier--3 figures

H. S. Parmelee's Patent Automatic sprinkler.--2 figures

Instrument for Drawing Converging Straight Lines.--10 figures

Feed Water Heater and Purifier. By GEO. S. STRONG.--2 figures

Paper Making "Down East."

Goulier's Tube Gauge.--1 figure.-Plan and longitudinal and
transverse sections

Soldering Without an Iron

Working Copper Ores at Spenceville

II. TECHNOLOGY AND CHEMISTRY-New Method of Detecting
Dyes on Yarns and Tissues. By JULES JOFFRE.--Reagents.--Red
colors.--Violet colors

Chevalet's Condenso-purifier for Gas.--2 figures.--Elevation and
plan

Artificial Ivory

Creosote Impurities. By Prof P. W. BEDFORD

III. ELECTRICITY. ETC.--Sir William Thomson's Pile--2 figures