iv 



and also for determining the Height above the Level of the Sea, &c. 

 of intermediate points passed over between Sheerness and London 

 Bridge. By John Augustus Lloyd, Esq. F.R.S page 30 



Description of a Graphical Register of Tides and Winds. By Henry 

 R. Palmer, Civil Engineer 33 



Proposed Plan for supplying filtered Water to the Metropolis and its 

 Suburbs. By Lemuel Wellman Wright, Esq., Civil Engineer. 36 



On the Variable Intensity of Terrestrial Magnetism, and the Influence 

 of the Aurora Borealis upon it. By Robert Were Fox 37 



Description of a Mountain Barometer, the column of which is divi- 

 sible into two portions for safer and more convenient transport. By 

 Mr. Thomas Charles Robinson 40 



An account of further experiments tried at Chatham, for the purpose 

 of obtaining an artificial Water Cement. By Brevet-Colonel C. W. 

 Pasley,of the Corps of Royal Engineers, F.R.S, and Honorary Mem- 

 ber of the Institution of Civil Engineers 40 



On the Meteorological Observations made at the Apartments of the 

 Royal Society, during the Years 1827, 1828, and 1829. By J. W. 

 Lubbock, Esq. V.P. and Treasurer of the Royal Society 42 



On the Errors in the Course of Vessels occasioned by local attraction, 

 with some remarks on the recent loss of His Majesty's ship Thetis. 

 By Peter Barlow, Esq. F.R.S. &c 43 



On the Anatomy and Physiology of the Minute and Capillary Vessels. 

 By Marshall Hall, M.D 45 



On the effect of Water, raised to Temperatures moderately higher 

 than that of the Atmosphere, upon Batrachian Reptiles. By Mar- 

 shall Hall, M.D. &c 47 



Account of a new mode of propelling Vessels. By Mr. Wm. Hale. 48 



Additional thoughts on the use of the Ganglions in furnishing Electri- 

 city for the production of Animal Secretions. By Sir Everard Home, 

 Bart. F.R.S 48 



On a peculiar class of Acoustical Figures ; and on certain forms assu- 

 med by groups of particles upon vibrating elastic surfaces. By 

 Michael Faraday, Esq. F.R.S. M.R.I. Corresponding Member of 

 the Royal Academy of Sciences of Paris, &c 49 



A Table facilitating the Computations relative to Suspension Bridges. 

 By Davies Gilbert, Esq. V.P.R.S 51 



Researches in Physical Astronomy. By J. W. Lubbock, Esq. V.P. 

 and Treasurer of the Royal Society 52 



An Account of the Construction and Verification of the Imperial 

 Standard Yard for the Royal Society. By Captain Henry Kater, 

 F.R.S 52 



An Experimental Examination of the Blood found in the Vena Porta?. 

 By James Thackeray, M.D... 53 



On the Caves and Fissures in the Western District of the Mendip 

 Hills. By the Rev. David Williams, A.M. F.G.S. Rector of the 

 parishes of Bleadon and Kingston-Seam oor, in the County of Somer- 

 set 55 



Researches in Physical Astronomy. By J. W. Lubbock, Esq. V.P. 

 and Treasurer of the Royal Society, 59 



