PREFACE. 



THE Authors of Original Papers and Communications in the 

 present Volume are Mrs. Agnes Ibbetson ; Thomas Forster, 

 Esq. ; J. A. De Luc, Esq. F. R 8. ; Mr. Thomas Shute; Thomas 

 Knight, Esq ; Dr. Baircl, Physician-General to the Navy; G. 

 Cumberland, Esq.; Mr. P. Barlow, of the Royal Military Aca- 

 demv, Woolwich ; John Wingfiekl, Esq. ; Mr. John Cuthbertson; 

 Marshall Hall, Esq. F. 11. M. S. E. ; Mr. F. Kerby ; Mr Mer- 

 rick, iun. ; William Moore, Esq. oF the Royal Military Academy, 

 Woolwich; Mr. T. Noot; Thomas Thomson, M. D. Lecturer on 

 Chemistry at Edinburgh, &c. 



Of Foreign Works, Honore Flaugergues ; Mr. d'Arcet ; Mr. 

 Sonnini ; Mr. Laplace; Count de Vargas; Prof. Klaproth ; Mr. 

 Tromsdorff; Mr.L. Cordier; Mr. John; Mr. Hauv; Mr. Guyton- 

 Morveau ; Mr. Bouillon-Lagrange ; Mr. Vogel ; Mr. J. E. Berard ; 

 Mr. Giliet Laumont; Mr. Bucholz ; Mr. Hersart; Prof. Henry 

 Braconnot. 



And of British Memoirs ahridged or extracted, Mr. Charles 

 Waistell ; Humphry Daw, Esq. Sec. R. S. F. R. S. E. M. R. L A. ; 

 Thomas Young, M. D. For. Sec. R. S.; Dr. William Roxburgh; 

 Mr. Richard Parkinson; Mr. Robert Richardson ; Everard Home, 

 Esq. F. R. S; William Hyde Wollaston, M. D. Sec. R. S.; 

 J. Macartney, Esq. ; Dr. Alexander Anderson. 



The Engravings consist of 1. Figures illustrating the Growth of 

 Seeds, in those of the Peach, Chestnut, Grass, and Palms, deli- 

 neated after Nature in various Periods of their Evolution, bv Mrs. 

 A. Ibbetson ; 2. Mr. De Luc's Electric Column, and Aerial Elec- 

 troscope ; 3. Mr. Shute's Scarificator on a new Principle ; 4. Dia- 

 grams to illustrate the Theory of Capillary Attra6lion, bv 1 homas 

 Knight, bsq. 5. Figures to illustrate the Structure and Classifica- 

 tion of Seeds, delmeated from Nature, by Mrs. A. Ibbetson ; 

 6. A Ma<:hine for raising large Stones out of the Earth, by Mr. 

 Richardson; 1. Apparatus for Experiments on the Sonorous Pro- 

 perties of Gasses, by Mr. F. Kerby and Mr. Merrick, juu. ; 



8. Crystals of Apophyllite, or Fisheye Stone, by Mr. Haiiy; 



9. A new Hygrometer for Gasses, by Mr. Guyton-Morveau ; 

 10 Delineations of Mr. Congreve's Military Rockets; II. The 

 Cancer-Fulgens, discovered by the Right Hon. Sir Joseph Banks, 

 of the natural Size ; 12. The same Animal magnified; 13. The 

 Medusa Peliucens, also found by Sir Joseph Banks, represented 



of the natural Magnitude. 



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