PREFACE. 



THE Authors of Original Papers and Communications in the 

 present Volume are Mrs. Agnes Ibbetson; Luke Howard, 

 Esq. ; Richard Lovell Edgeworth, Esq.F. R. S. M. R. I. A. ; A. Z. j 

 Mr. George John Singer ; L. O. C. ; Mr. Benjamin Cook ; Mr. 

 John Murray ; A Lover of the Modern Analysis ; James Clarke, 

 M. D. late Physician to the Nottingham General Hospital; George 

 Pearson, M. D. F. R. S. &c. ; Mathematicus ; the Right Hon. Lord 

 Gray ; Alexander Marcet, M. D. F. R. S. one of the Physicians 

 to Guy's Hospital ; A. B. C; J. Phoenix; Benjamin Smith Barton, 

 M. D. Mem. of the Am. Phil. Soc. &c. ; J. D. Maycock, M. D. ; 

 John Davy, Esq, ; and a Correspondent. 



Of Foreign Works, M. Henry; M. Klaproth ; Mr. J. E. Berard; 

 M. Gay-Lussac ; M. Guyton-Morveau ; M.Theodore de Saussure; 

 M. Bucholz; M. Hildebrandt; M. Reuss; M. Vauquelin ; M. 

 Huberle ; M. Marcel de Serres ; and Dr. Francis Delaroche. 



And of British Memoirs abridged or extracted, Mr. J. Allan ; 

 William Thomas Brande, Esq. F. R. S. ; James Parkinson, Esq, ; 

 Mem. of the Geol. Soc; Mr. William Salisbury ; William Hyde 

 Wollaston, M. D. Sec. R. S; Alexander Marcet, M. D F. R. S. 

 &c. ; Mr. Adam Reid ; Mr. George Spark; .Thomas Andrew 

 Knight, Esq. F. R S. &c. ; Mr. John Maher, F. H. S. ; A. Hawkins, 

 Esq.; William Fitton, M. D.; William Charles Wells, M. D. 

 F. R. S. ; Mr. Benjamin Cook ; Mr. H. B. Way; SmithsonTennant, 

 Esq. F. R. S. &c. ; and W. H. Pepys, Esq. F. R. S. &c. 



The Engravings consist of 1. Delineations from Nature illus- 

 trative of the Mechanism of Leaves, by Mrs. Agnes Ibbetson. 2, 

 Mr. Allan's Mathematical Dividing Engine. Sand 4. DeHneations 

 from Nature of different Parts of Flowers, to illustrate their 

 Mechanism, by Mrs. Agnes Ibbetson. 5. Figures to illustrate some 

 Diseases of Vegetables, delineated from Nature, by Mrs. Agnes 

 Ibbetson. 6. Appearances from Sugar in the Serum of Blood, by 

 W. H. Wollaston, M. D. Sec. R. S. 7. A Compensation Pen- 

 dulum, by Mr. Adam Reid. 8. Mr. G. Spark's Noctuary, or 

 Apparatus for indicating the Hour in the Dark by Means of a 

 common Watch. 9 and 10. Dissections of Aquatic and Semi- 

 aquatic Plants, delineated from Nature by Mrs. A. Ibbetson. 11, 

 Apparatus for making Gas and various other Products from Pit- 

 coal, by Mr. Ben. Cook. 12. Method of procuring Turpentine 

 from British Firs, by Mr. H. B. Way. 13. Apparatus for ex- 

 posing Animals to a heated humid Atmosphere, by Dr. Francis 

 Delaroche. 



TABLE 



