EDINBURGH :

PRINTED FOR T. CADELL JUN. AND W. DAVIES
(SUCCESSORS TO MR CADELL) IN THE STRAND, LONDON,

AND

104667

CONTENTS

OF THE

FOURTH VOLUME.

PART

HISTORY of the SOCIETY.

Four Theorems for refolving all the Cafes of Plane and Spheri-

cal Triangles, by the Reverend Mr Fisher,

I.

Page 4

Differtation on the Philofophy of Light, Heat, and Fire, by

Dr Hutton,

Improvement of the Mercurial Level, by Mr Keith,

Experiments on the Effects of Opium on the Living Animal, by

Dr Wilfon,

On the Diurnal Variations of the Barometer, by Dr Balfour

of Calcutta,

On the Sulphurating of Metals, by Dr Hutton,.

New Obfervatory at Aberdeen,

APPENDIX.

Office-Bearers of the SOCIETY,

LIST of MEMBERS, continued from the third Volume,

MEMBERS DECEASED,

Donations,

I. Biographical Account of Lord Abercromby,

II. Biographical Account of William Tytler, Efq; of Wood-

boufelee,

7.

17.

18.

25.

27.

29.

31.

33.

36.

38.

(i).

(17).

III. Biogra