Isochromatic Photography.--By FRED. E. IVES.--2 figures.

Distortion from Expansion of the Paper in Photography.


III. ELECTRICITY, ETC.--On the Fritts Selenium Cells and
Batteries.--A paper read before the American Association
by C.E. FRITTS.

Electricity Applied to the Manufacture of Varnish.--2 figures.

Naglo Brothers' Telephone System.--3 figures.

The Gerard Electric Lamp.--1 figure.

A New Reflecting Galvanometer.--3 figures.


IV. ART AND ARCHITECTURE.--Groups of Statuary for the Pediment
of the House of Parliament in Vienna.--2 engravings.

The Casino at Monte Carlo.--An engraving.


V. PHYSICS.--Determining the Density of the Earth.--1 figure.

Physics without Apparatus.--The Porosity and Permeability of
Bodies.--A Hot Air Balloon.--2 engravings.