51 



then be collected, like the heavy powders in air, at the nodal lines. 

 In a denser medium, such as water, the reverse should happen ; the 

 heavy powders should be carried along by the more powerful cur- 

 rents then produced, and would accumulate in the vibrating parts. 

 All these conclusions were found to be fully verified by actual ex- 

 periment. 



May 1 9. 



JOHN W. LUBBOCK, Esq. M.A.,V. P. & Treasurer, in the Chair. 



The following Presents were received, and thanks ordered for 

 them : — 



The Astronomical Remembrancer. Proposed by Captain W. H. 

 Smyth, R.N., F.R.S. : exhibiting the Magnitude, Declination, 

 Right Ascension, and Passage in mean time over the Meridian, 

 of one Hundred of the Principal Fixed Stars. — Presented by G. 

 Dollond, Esq., F.R.S. 



A Narrative of a Visit to the Court of Sinde ; a Sketch of the Hi- 

 story of Cutch, from its first connection with the British Govern- 

 ment in India till the conclusion of the Treaty of 1819 ; and some 

 Remarks on the Medical Topography of Bhooj. By James 

 Burnes, Esq.Svo. — The Author ; through Joseph Hume, Esq. F.R.S. 



Catalogue of the Library of the Royal College of Surgeons in Lon- 

 don. 8vo. — The College. 



Catalogue of the Contents of the Museum of the Royal College of 

 Surgeons in London. Part III. : comprehending the Human and 

 Comparative Osteology. 4to. — The College. 



A Cast from the Marble Bust of Michael Faraday, Esq. F.R.S. exe- 

 cuted by E. H. Bailey, R.A. — Richard Hollier, Esq. 



A Portrait of Michael Faraday, Esq. F.R.S. engraved by Cousins 

 from the Painting by Pickersgill. — Messrs. Colnaghi and Son. 



A paper was read, entitled, " A Table facilitating the Compu- 

 tations relative to Suspension Bridges." By Davies Gilbert, Esq. 

 V.P.R.S. 



The table here communicated is supplementary to those accom- 

 panying the paper " On the Mathematical Theory of Suspension 

 Bridges," which was published in the Philosophical Transactions for 

 1826, and is deduced from the first of the tables there given • but 

 admits of a far more ready application than the former to all cases 

 of practical investigation. It consists of five columns, exhibiting 

 respectively the deflections or versed sines of the curve; the lengths 

 of the chains ; the tension at the middle points, or apices of the 

 curve; the tensions at the extremities ; and the angles made by the 

 chains with the horizon at the extremities. 



A paper was read, entitled, "Researches in Physical Astro- 



