PREFACE. 



THE Authors of Original Papers and Communications in tfie 

 present Volume are J. A. De Luc, Esrj. F. R 8. ; G. Cum- 

 berland, Esq. ; Marshall Hall, Esq. F. R. M. S. E. ; Mr. Jos. Hume ;• 

 Justus; C. ; Mr. John Dalton ; Mrs. Agnes Ibbetson; Robert Lvall, 

 M. R. P.'S. E. &c.; Mr. J. Murray, Lecturer on Chemistry, Edin- 

 burgh; A.B. ; Thomas Knight, Esq; W. Moore, Esq ; the Rev, 

 William Gregor; Mr. John Davy; L. O. C; J. Bostock, M. D. j 

 Thomas Forster, Esq. ; F. D. ; F. R. Govvar, Esq. 



Of Foreign Works, M. A. Laugier; M. HonorS Flaugergues; 

 Nathaniel Bowditch, A. M. A. A. S. M. Phil. Soc. Philad'."; M. C. 

 J. T. de Grotthuss ; M. J. H. Hassenfratz ; Prof. Henry Bra- 

 connot ; Prof. C. Dumeril ; Messrs. Desormes and Clement. 



And of British Memoirs abridged or ex'tracted, Thomas 

 Thomson, M. D. Lecturer on Chemistry, Edinburgh ; FL Davy, 

 Esq. LL. D. Prof. Chem, R. L F. R. S. E. M. R. L A. &c. Charles 

 Le Hardy, Esq. ; J. Macartney, Esq. ; W. T. Brande, Esq. F.R.S. ; 

 W.Hyde Wollaston, M. D. Sec. R. S; T. A. Knight, Esq. F.R. S.;- 

 The Rev. John Brinkley, D. D. F. R. S. Andrews Prof, of Astr. - 

 in Dublin. 



The Engravings consist of LA Machine for producing smalt- 

 Quantities of Electricity, by J. A. De Luc, Esq. F.R.S. 2. 

 Delineations and Dissections of various luminous Animals, from 

 James Macartney, Esq. 3. Diagrams for the Calculation of the 

 Height of Meteors, by N. Bowditch, Esq. 4. Joint of the Pha- 

 sed us Coccinea, delineated from Nature, by Mrs. Ibbetson. 5. 

 Changes in the Stamens and Pistils of the Passion Flower, by Mr. 

 R. Lyall. 6. Influence of Galvanism in Metallic Arborizations, 

 by C. J. T. de Grotthuss. 7. Diagrams to illustrate the Motion of 

 Rockets, by W. Moore, Esq. 8. Dissection of the Petals of va- 

 rious Flowers, showing the Structure from which the Beauty of 

 their Colour arises, by Mrs. A. Ibbetson. 9. Parts of the Corollas 

 of different Flowers delineated from Nature, by the same Lady. 

 10. Two new Constructions of the Air Ptfmp. 11. Dissections of 

 Plants, showing the Growth of the Bud, by Mrs. A. Ibbetson. 

 12. Dissections of Plants to illustrate the Growth of the Bud, by 

 Mrs. Agnes Ibbetson. 13. A Machine for Evaporating Liquids 

 without'Heat, by the late Mr. Joseph Montgolfier. 



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