Desruelles's Electric Lighter. 1 figure. 4976

Solenoid Underground Wires in Philadelphia. 4976

Dr. Herz's Telephonic Systems. 2 figures. 4976

Decision of the Congress of Electricians on the Units of
Electric Measures. 4977

Secondary Batteries. By J. ROUSSE. 4977

III. TECHNOLOGY AND CHEMISTRY.--Domestic Sugar Production. 4980

M. Garnier's New Methods of Photo-Engraving. By Major J.
WATERHOUSE.--Photogravure.--Photograph printing by
vapor.--Atmography. 4982

Dangers of Pyrogallic Acid. By DR. T.L. PHIPSON. 4982

IV. ARCHITECTURE, ETC.--Artists' Homes, No. 12.--Wm. Emerson's
house, Little Sutton, Chiswick.--Full page illustration and
large size longitudinal section. 4978

Memorable English Houses. 4 figures.--Newton's house.--
Flaxman's house.--Canning's house.--Johnson's house. 4980

V. GEOGRAPHY.--Herald Island.--On the summit.--A midnight
observation.--Plant life on Herald Island.--Inhabitants of
the cliffs. 4980