PREFACE. 



HE Authors of Original Papers and Communications in the 

 present Volume are Dr. John New; Pat. Neill, Esq. F.W. S. ; 

 Richard Lovell Edgeworth, Esq. F. R. S. and M. R.I. A. ; J. G. ; 

 W. N. ; Mrs. Agnes Ibbetson ; Mr. James Thomson ; John Gough, 

 Esq.; the Rev. J. Blanchard ; Dr. Clarke; Mr. Peter Barlow; 

 Mr. J. Acton ; J. S. K. ; Mr. Charles Sylvester; Mr. T. Sheldrake; 

 William Saint, Esq.; A Correspondent. 



Of Foreign Works, M. Vauquelin ; M. Fourcroy ; M. Chevreul ; 

 M. Bertrand; Professor Link ; M. Boul lay; Professor Lampadius; 

 L. Cordier; M. Gay-Lussac; M.Tbenard; M. Guyton-Morveau ; 

 M. Aluau; Professor Moj on ; M. Resal; M. Leblanc; B.G.Sage; 

 M. Berthier; M. Gehlen; M. Deseotils; M. Bosc; C. L. Berthollet ; 

 M. Seguin; Professor Curaudau. 



And of British Memoirs abridged or extracted, Thomas Andrew 

 Knight, Esq. F. R. S. &c; Rev. Jofeph Townshend; Mr. 

 Ezekiel Cleall; W.* Bond, Esq.; W.Matthews, Esq.; Mr. 

 Parkinson; J. Christ. Curwen, Esq.; J. Franklen, Esq.; Mr. 

 Samuel Curtis; Mr. Thomas Davis; Mr. Samuel Clegg; Mr. 

 Thomas Saddington ; Mr. Wagstaffe ; J. Butler, Esq. ; Thomas 

 Walford, Esq. F. A. S. and L. S. ; Thomas Marsham, Esq. Trea. 

 L. S; George Montagu, Esq. F. L. S. ; John Williams, Esq. ; 

 Arthur Young, Esq. F. R S. ; Captain Kater; Humphry Davy, 

 Esq. Sec. R. S. F. R. S. Ed. and M. R. I. A. ; Mr. William 

 Sewell; Thomas Young, Esq. M. D. For. Sec. R. S. 



The Engravings consist of 1. Knight's new Method of Training 

 Fruit Trees: 2. Mr. Cleall's Machine for Beating out the Seed of 

 Hemp and Flax: 3. Mr. Bond's Machine for Breaking Hemp: 4. 

 Mr. Samuel Clegg's Apparatus for making Carburetter! Hidrogen 

 Gas from Pitcoal: 5. His Lamp for burning the Gas . 6. Different 

 Insects, called Wireworms, that destroy Wheat: 7. The Nasal 

 Membranes of two Species of Horseshoe Bat: 8. Figures to il- 

 lustrate the Vivification of Seeds, by Mrs. A. Ibbetson: 9. A 

 very sensible Hygrometer, by Lieutenant Henry Kater: 10. An 

 improved Hygrometer, by the fame Gentleman : 11. Mr. Davy's 

 Apparatus for heating Potassium in Gasses, Distilling Potassium, 

 and taking the Voltaic Spark in Sulphur and Phosphorus: 12. Va- 

 rious Figures by Mrs, Agnes Ibbetson, to illustrate the Growth of 

 Leaves, and the Divisions of the Wood in the Stem of Trees : 

 13. Figures showing the Line of Life in Trees entering into Flower 

 Buds, passing by Leaf Buds, and avoiding an injured Part: 14. 

 Dissections of Seed Vessels: 15. Cryptogamian Plants, that have 

 been mistaken for Perspiration on Leaves: 16, Delineations by 

 the Camera Obscura and Camera Lucida, 



TABUS 



