PREFACE. 



X HE Authors of Original Papers and Communications in the 

 present Volume are, the Rev. E. J. Burrow, A. M. ; Sir Thomas 

 Clarges, Bart.; P. Barlow, Esq.; Mr. John Farey; Mr. William 

 Skrimshire, jun. ; Dr. Thomas Stewart Trail! ;• A Correspondent; 

 Richard Greene, Esq. P.R. M.S. E. ; Mr. B. Cook; Mr. James 

 Scott ; G. K. M. ; Philochemicus ; Mr. de Luc ; E, F. G. H. ; S. N. ; 

 Sir George Cayley, Bart. ; T. ; Mr. Charles Hayter; Mr. W. Wel- 

 don; W. Saint, Esq.; Arthur Aikin, Esq. ; Thomas Young, M.D. 

 F. R. S. ; John Gough, Esq. ; J R. Gowen, Esq. ; C. O, T. 



Of Foreign Works, M. Tonnelier; M. Blavier; J. C, Delame- 

 therie; Hericart de Thury ; H. Lelivec; C. L. Cadet; M. Guyton- 

 Morveau. 



And of British Memoirs abridged or extracted, William Her- 

 shel, L.L.D. F.R.S.; T. A. Knight, Esq. F. R S. ; Mr. Wil- 

 liam Brande; Everard Home, Esq. F. R. S. ; Humphry Davy, 

 Esq. Sec. R, S. M. R. I. A. ; William Henry, M.D.'; Tho- 

 mas Young, M.D. for. Sec. R. S. ; John Goldingham, Esq. 

 F. R.S.; William Richardson, D. D.; W. Allen, Esq. F.R.S.; 

 W. H. Pepys, Esq. F. R. S. ; Right Hon. Sir Joseph Banks, Bart. 

 K. B. P. 1LS. ; Mr. James Parkinson; R. A. Salisbury, Esq. 

 F.R. S.; Mr. John Dunbar; Henry Reeve, M.D. ; Dr. James 

 Howison; Mr. James Broad; Bath Agricultural Society; Lord 

 Somerville; John Billingsley, Esq. ; Mr. Charles le Caan ; James 

 Edward Smith, M. D. F. R. S. P.L. S.; William Hunter, Esq. 

 -Sec. A. S. ; Mr. William Anderson; Dr. Alexander Anderson. 



The Engravings consist of 1. An improved Goniometer, by the 

 Rev. William Burrows: 2. Views of the late Comet, by Dr. Her- 

 schel: 3. Crystals of the Diopside, a new Species of Mineral: 

 4. Mr. Christopher TowilPs Life Boat: 5. Delphinus Melas, a 

 non descript of the Order Cere: 6. Dr. W. Henry's Apparatus 

 for the Analysis of the Compound inflammable Gasses by slow 

 Combustion: 7. Messrs. Alien and Pepys's Apparatus for showing 

 the Changes produced in Air by Respiration. 8. View of Port- 

 moon: 9. View of Pleskin, on the N. W. Side of Bengore Pro- 

 montory: 10. Sir George Cay ley's Plan for a Theatre: 11. The 

 Chinese Method of propagating Fruit Trees: 12. Mr. Broad's In- 

 strument for measuring standing Timber: 13. Mr. Le Caan's im- 

 proved Tram Plates for Rail Roads: 14. Guyton-Morveau's per- 

 manent Apparatus for destroying Contagion. 



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