Photo-Tricycle Apparatus.--1 figure.

A Photo Printing Light.--1 figure.

A New Actinometer.

Astronomical Photography.

Electricity as a Preventive of Scale in Boilers.


III. DECORATIVE ART.--Alphabet designed by Godfrey Sykes.--An
engraving.

Old Wrought Iron Gate.--An engraving.


IV. GEOLOGY.--The Organization and Plan of the United States
Geological Survey.--By J.W. POWELL.--A topographic map
of the United States.--Paleontology.--Chemistry.--Physical
researches.--Statistics.--Library.--Publications.--General
geology.--Economic geology.--Relation of the general survey
to the State survey.


V. BOTANY, ETC.--The Sunflowers.--Annuals, perennials, etc.--11
engravings.

Lye's Fuchsias.--1 engraving.