CONTENTS OF VOL. III.

OPTIC.S.

Page

Conversation
1. Light: the Smallness and Velocity of its

Particles - - .
II. Rays of Light :-Reflection and Refraction
III. Refraction of Light .'

-
IV. Refraction and Reflection of Light - -

v. Different kinds of Lenses • - .
VI. Parallel, diverging, and converging Rays
VII. Images of Objects--Scioptric Ball, &c. .
VIII. Nature and Advantages of Light
IX. Colours . . . . . . .

X. Reflected Light and Plain Mirrors . .
XI. Concave Mirrors - - -
XII. Concave Mirrors Experiments
XIII. Concave and Convex Mirrors - -
XIV. Optical Deceptions, Anamorphoses, &c.

XV. Different parts of the Eye •
XVI. Manner of Vision - .
XVII. Spectacles, and their Uses

.
XVIII. Rainbow - -
XIX. Refracting Telescopes - ;.
XX. Reflecting Telescopes
XXI. Microscope - -
XXII. Camera Obscura, Magic Lantern, and Mul.

tiplying Glass - - - -

110

119

MAGNETISM.

Conversation

XXII. The Magnet . . .

XXIV. Magnetic Attraction and Repulsion

XXV. Methods of making Magnets • •

XXVI. Mariner's Compass - . i .

- 131

135

. 140

151

158

163

169

180

ELECTRICITY.

XXVII. Early History of Electricity - . . 147

XXVIII. Electrical Attraction and Repulsion

XXIX. Electrical Machine - - . .

XXX. Electrical Machine . . . .

XXXI. Electrical Attraction and Repulsion

XXXII. Electrical Attraction and Repulsion

176

XXXIII. The Leyden Phial - - - ..

XXXIV. Lane's Electrometer, and the Electrical

Battery - - - - -

187

XXXV. Experiments with the Battery . 192

XXXVI. Miscellaneous Experiments -
XXXVII. Electrophorus, Thunder-House, &c.
XXXVIII. Atmospherical Electricity
XXXIX. Aurora Borealis ; Water-Spouts; Earth-

quakes · - ,-
XL. Medical Electricity .
XLI. Animal Electricity .. .
XLII. Summary of Electricity :

GALVANISM, OR VOLTAISM.

XLIII. The Origin of Galvanism, - - - 241

XLIV. Galvanic Light and Shocks - .

XLV. Voltaic Conductors, Circles, Tables, &c. 251

XLVI. Miscellancous Experiments - - - 257

Glossary and Index

, 263

| THE NEIV YORK PUBLIC L'ERATY

ASTO., Liiva moto
TILDEN FOUNDATIO VS.