VI. AN APPENDIX to the GEOMETRICAL AND GRAPHICAL ESSAYS, containing the following Table by Mr. John Gale, viz. a Table of the Northings, Southings, Eastings, and Westings to every Degree and fifteenth Minute of the Quadrant, Radius from 1 to 100, with all the intermediate Numbers, computed to three Places of Decimals. Price 2s.


Just Published
ESSAYS ON THE MICROSCOPE,
BY THE LATE AUTHOR,

In Quarto, with thirty-four folio Plates, separate. The Second Edition, with many
Corrections, Additions, and Improvements, by

FREDERICK KANMACHER,
Fellow of the Linnean Society.

Price 1l. 8s. in Boards.



Also in the Press,
And speedily will be published,
LECTURES
ON NATURAL AND EXPERIMENTAL
PHILOSOPHY,

In Five Volumes 8vo. The Second Edition, with upwards of Forty large Plates, considerable Alterations and Improvements; containing more complete Explanations of the Instruments, Machines, &c. and the Description of many others not inserted in the former Edition.