PREFACE. 



THE Authors of Original Papers and Communications in the 

 present Volume are Mrs. A.Ibbetson ; Analyticus; A. H. Z. ; 

 J. Bostock, M. D. Vice Pres. of the Lit. and Phil. Soc. of Liver- 

 pool ; T. S. Traill, M. D. Sec. to the same Society ; T. B. ; G. 

 Pearson, M. D. F. R. S. &c. ; L. Howard, Esq. ; Right Hon. W. 

 J. Lord Gray; Mr. E. Lvdiatt, Prof, of Mechanics, &c; Benja- 

 min Count of Rumford, F. R. SS. L. and E. M. R. J. A. &c. ; 

 D. E. F. ; Mr. J. Gough ; Mr. J. Murray ; J. Nowell, Esq. ; J. A. 

 De Luc, Esq. F. II. S. ; J. Farey, sen. Esq. and E. G. 



Of Foreign Works, M. J, Fabbroni, Cor. Mem. of the French 

 Institute; M. D'Arcet; M. Schrader; Mr. Laugier; D. J. Carra- 

 dori; M. Vauquelm ; Dr. Wienhold ; M. Bucholz ; Prof. Cu- 

 raudau ; Prof. Klaproth ; M. Sonnini ; M. Thenard ; M Braun ; 

 A. S. Duportal, M. D. ; M. T. Pelletier; M. Chevreul ; M. Robi- 

 net ; Prof. J. B. Vitalis; M. Leschenault ; M. J. C. Delametherie; 

 M. H. Flaugergues ; and Prof. H. Braconnot. 



And of British Memoirs abridged or extracted, A. Marcet, 

 M. D. F. R. S. ; &c. W. T. Brande, F. R. S. ; H. W. Way, Esq. ; 

 Mr. E. Smith; F. Fortune, Esq. Mr. P. Sleavin; N.Nugent, 

 M. D. Hon. Mem. of the Geol. Soc. ; 'J. Davy, Esq. ; S. Tillard, 

 Esq. Capt. R. N. ; J. Stephens, Esq. ; W. Jones, Esq. ; Mr. C. 

 Waistell; Mr. T. Dickson, Mr. J. Fuller; C. H. Parrv, M. D. 

 F. R. S.; T. A. Knight, Esq. F. R. S. Prof. Hort. S. *&c. ; and 

 Mr. J. Maher, F. H. S. 



The Engravings consist of 1. Dissections of Plants of the Class 

 Cryptogamia, delineated from Nature, by Mrs. A. Ibbetson, in 

 two Plates. 2. Mr. E. Lydiatt's Smicrologometer, for ascertain- 

 ing the Tenacity of Metals, and Strength of Threads of Silk, Cot- 

 ton, Linen, &c. 3. A Dissection of a Flower, in a 4to. Plate : 

 and 4. A Branch of Laburnum, with a Section considerably mag- 

 nified; all delineated from Nature by Mrs. Agnes Ibbetson. 5. 

 Closure and draining Bricks, by J. Stephens, Esq. 6. Method of 

 constructing a temporary Rick for securing Corn in wet Weather, 

 by W. Jones, Esq. 1. An improved Dibble for planting Acorns 

 in Bushes, by Mr. C. Waistell. 8. A Potato, with the Method of 

 taking Sets from it for preventing the Curl, by Mr. T. Dickson. 

 9. Diagram illustrative of Electric Attractions and Repulsions, by 

 J. C. Delametherie. 10. Diagram illustrating the Law of Evapo* 

 ration, by Honore Flaugergues. 1 1. Different Modes of construct- 

 ing the Breech of a Gun, so as to make it throw the Shot close, or 

 scattering, by a Correspondent. 12. An improved Scarificator, 

 by Mr. John Fuller. 



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