VI 



Experiments made on a piece of Pena silver, saved from the Lady 

 Charlotte, wrecked on the coast of Ireland in December 1835, as 

 to its capability of holding water. By W. D. Haggard, Esq... page 119 



On the Apphcation of the Conversion of Chlorates and Nitrates into 

 Chlorides, and of Chlorides into Nitrates, to the determinations of 

 several equivalent numbers. By Frederick Penny, Esq 119 



Some account of the Art of Photogenic Drawing, or the Process by 

 which Natural Objects may be made to delineate themselves with- 

 out the aid of the Artist's Pencil. By H. F. Talbot, Esq. F.R.S.... 120 



Notice of a Shock of an Earthquake felt in the Island of St. Mary's, 

 one of the Scilly Islands, on the 21st of January, 1S39, in a letter ad- 

 dressed to the Secretary. By the Rev. George Wordley 122 



Researches on the Chemical Equivalents of certain Bodies. Bv 

 Richard Phillips, Esq. F.R.S '. 123 



Some Account of the Hurricane of the 7th of January, 1839, as it was 

 experienced in the neighbourhood of Dumfries, in a letter addressed 

 to P. 3SI. Roget, M.DrSecretar\- to the Royal Society. By P. Gar- 

 den, Esq 123 



An Account of the Processes employed in Photogenic Drawing, in a 

 letter to S. Hunter Christie, Esq. Sec. R.S. ^Bv H. Fox Talbot, 

 Esq. F.R.S 124 



A Description of a Hydropneumatic Baroscope. By J. T. Cooper, Esq. 

 Lecturer on Chemistry 126 



Obser\-ations on the PsLrallel Roads of Glen Roy, and of other parts 

 of Lochaber, with an attempt to prove that thev are of Marine 

 Origin. By Charles Darwin, Esq. :\LA. F.R.S'. Sec. Geological 

 Society 127 



On the Male Organs of some of the Cartilaginous Fishes. By John 

 Da^-y,. M.D. FTR.S. Assistant Inspector of Army Hospitals. .' 129 



Researches in Physical Geology. — Third Series. On the Phasnomena 

 of Precession and Nutation, assuming the interior of the earth to be 

 a heterogeneous nuia. By W. Hopkins. Esq. M.A. F.R.S. &c. ... 129 



An Experiniental Inquiry into the Fn ror.tion of Alkaline and Earthy 

 Bodies with reference to their :n Plants, the Influence of 

 Carbonic Acid in their generation, and their equihbrium of this 

 gas in the atmosphere. By Robert Rigg, Esq ,. 130 



Note on the Art of Photography, or the application of the Chemical 

 Ravs of Lisht to the purposes of Pictorial Representation. Bv Sir 

 John F. Herschel, Bart. K.H. V.P.R.S. 6cc 131 



Description of a Compensating Barometer, adapted to ^Meteorological 

 purposes, and requiring no corrections ehher for Zero, or for Tem- 

 perature. By Samuel B. Howlett, Esq., Chief ^Military Draftsman, 

 Ordnance 133 



An Account of the fall of a ^Meteoric Stone in the Cold Bokkeveld, 

 Cape of Good Hope. Bv Thomas ISIaclesm, Esq. F.R.S. &c. in a 

 letter to Sir John F. W. Herschel, Bart. V.P.R.S 134 



Chemical Account of the Cold Bokkeveld Meteoric Stone. Bv Michael 

 Faradav, Esq. D.C.L. F.R.S. 6cc., in a letter to Sir John F. W. 

 Herschel, Bart. V.P.R.S. 6cc 134 



