ADVERTISEMENT. 



JL HE Authors of Original Papers in the present Volume, 

 are John Dal ton, Esq. ; Mr. J. Andrew; Sir A. N. Edel- 

 crantz; Samuel Day, Esq.; The Right Honourable the 

 Marquis of Exeter ; W. N. ; Mr. Robert Harrup ; J. B. ; 

 The Rev. Wm. Gregor; Mr. Benjamin Hooke ; Mr. John 

 Gough ; and Mr. Frederick Accum. Of foreign Works, 

 M. Proust ; Joses ; Vauquelin ; Trousset ; Lagrave ; Darcet ; 

 Van-Marum ; Vassali Eandi ; Carbonell ; Parmentier ; Cadett; 

 Boullay ; Ritter and Curaudau. And of English Memoirs 

 abridged or extracted, B. H. Latrobe, F. A. P. S. ; Mr. 

 Robert Dossie; Thomas Eccleston, Esq. ; Mr. John Webb; 

 Mr. Richard Knight ; The Right. Hon. Sir J. Banks, Bart. 

 P. R S. ; William Herschell, L. L. D. F. R. S. ; Richard 

 Kirwan, L. L. D. F. JL S. ; Richard Chenevix, Esq. F. R.S.; 

 John Templeton, A. L. S. ; Benjamin Smith Barton, M D ; 

 Philip Crampton, M. D. ; H. Davy, Esq.; Mr. William 

 Henry ; M. Komarewski ; and Charles Hatchett, Esq. 



Of the Engravings the Subjects are, 1. An improved 

 Gun-Lock, by Mr. John Webb. 2. An Apparatus for spliting 

 Logs of Wood, by Mr. R. Knight. 3. Mr. Eccleston's Peat- 

 borer. 4. The Ornifcus Prasgustator, as it resides in the 

 Mouth of the Bay Alewife. 5, Outline Drawing of the 

 Clupea Tyrannus or Bay Alewife. 6. Figure to illustrate a 

 new Method of computing the Longitude, by Mr. Andrew. 

 7. Two Plates of Figures illustrative of Dr. Herschell's Memoir 

 on the Structure of the Heavens. 8. Sir. A. N. Edelcrantz's 

 new Statical Lamp. 9. An Ancient Magazine Gun for 

 quick firing. 10. An Ancient Lock of thirteen hundred 

 Combinations. 11. An Apparatus for Distillation, by Sir 



A.N. 



