PREFACE, 



Ti 



HE Authors of Original Papers and Communications in the 

 present Volume are, John Gough, Esq. ; Dr. Thomas Stewart 

 Traill; Opsimath; A. Dilethante ; Mr. William Cooke: Mr. 

 William Skrimshire, Jun. ; Mr. Robert Bancks ; P. Barlow, Esq. ; ' 

 A Correspondent; Dr. Beddoes^ J. B. ; .lohn Bostock, M. D. ; 

 W. Saint, Esq,; Mr. A. Combes; J. A. De Luc, Esq.; William 

 Walker, Esq.; W. Moore, Esq.; James Woodhouse; Mr. B. 

 Cook ; Mr. J. Acton ; S. Vince. 



Of Foreign Works, M. Vauquelin ; John Michael Haussmann ; 

 M. Gueniveau ; M. Berthier; M. V. Auarie; M. Frederic Mohs i 

 M. Tonnelier; M. P. Turpin; M.Theodore de Saussure; A. 

 Avogadro; J. C. Delamatherie ; LewisCordier; J. P. D'Aubiiisson; 

 Professor Proust ; R. J. Hauy. 



And of British Memoirs abridged or extracted, Thomas 

 Andrew Knight, Esq.; Lord Ribblesdale; Thomas Thomson, 

 M. D. F.R.S.; Mr. AVilliam Hardy; Mr. Henry Ward; Mr. 

 Martin Furniss; Abraham Parsons, Esq.; Mrs. Hooker; Mr. 

 William Murdoch ; Everard Home, Esq. F. R. S. ; Mr. Gilbert 

 Gilpin; Mr. Christopher Wilson ; J. Witley Boswell, Esq. ; Major 

 Spencer Cochrane; William Hyde Wollaston, M. D. Sec. R. "S. ; 

 Mr. George Smart; Mr. Joseph Davis; Mr. S. Mendham; Mr. 

 Edward Massey ; Edmund Turrell ; Robert Buchanan ; Mr. Joseph 

 Collier; Mr. William Shipley; Humphry Davy, Esq. Sec. R. S. 



The F^ngravings con.sist of 1. Dr. Traill*s Mercurial exhausting 

 Machine; 2. Problem by J. Gough, Esq.; 3. Mr. Hardy's Cor- 

 rection of Vibration in Time Keepers ; 4. Mr. Henry Ward's 

 Compensation Pendulum; 5. Mr. Furniss's Air-tight Door Hinge; 

 6. Mr. C. Gilpin's Machine for raising Coals; 7. Mr. C. Wilson's 

 secure Sailing or Life Boat; 8. Mr. J. Boswell's improved Capstan ; 

 9. Mr Mendham's Escapement ; 10. Mr. Davis's Chimney Brush ; 

 II. Mr. Davis's Pannels for Security; 12. M. Tonnelier on the 

 Me'ionite ; 1 3. Mr. Massey 's Patent Log ; 14. Mr. Massey's Sound- 

 ing Machine; 15. Diagrams illustrating the Problem respecting the 

 Radius of Curv.uure ; 16. Instruments for the Construction of im- 

 proved Chemical Muffles ; 17. Mr. Collier's Ship's Stove 5 18. Mr. 

 Shipley's Floating Light; 19. Mr. Acton's Improvement in the 

 Still; 20. Crystals of Carbonate of Lime. 



TABLE 



