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Contents of the Chapters. 
PART the FIRST. 
INTRODUCTION, p. xvii. 
C HAP. I. Of Microfcopes in gene *• 
ral ' ^ p. i 
Chap. II. Of the Kinds of Microfcopes 7 
Chap. III. Mr . Wilson’s Single Pocket - 
Microfcope g ' 
Chap, IV. Xf new Invention for fixing the 
Pocket- Microfcope, and giving Light to it 
by a Speculum jg 
Chap. V. Of the Double Refielding Mi¬ 
crofcope 16 
Chap. VL The Solar or Camera Obfcura, 
Microfcope 2 2 
Chap. VIL The Microfcope for Opake Ob- 
jells __ * 2 7 
Chap. VIII. To find the magnifying Power 
of Glajfes employed in Single Microfcopes 0 % 
Chap. IX. 1 he magnifying Power of 
Qlafiesin t he Double Microfcope 39 
Chap, 
