CONTENTS. 



Page 



I. POPULAR INTRODUCTIONS TO NATURAL PHILOSOPHY . i c 



^~.J" 



II. SIR ISAAC NEWTON'S OPTICS . , . 164 



III. A DESCRIPTION OF OPTICAL INSTRUMENTS . . 160 



.A>" : ' 



IV. THE THERMOMETER AND PYROMETER . 164 

 V. ELECTRICITY .... 164 



VI. GALVANISM ...... 132 



VII. MAGNETISM ...... 1 96 



VIII. ELECTRO-MAGNETISM . . . . 1100 



IX. Glossary ....... 115 



X. Index 1644 



iy for the nail. 



