. IV CONTENTS. 



NUMBER LXXX.— AUGUS1. 



Page 

 Experiments to determine the Composition of the different Species of Pit- 

 Coal. By Thomas Thomson, M.D. F.R.S 8 J 



On a Native Compound of Sulphuret of Lead and Arsenic. By James 



Smithson, Esq. F.R.S gQ 



Researches on a new Mineral Body found in the Sulphur extracted from 



Pyrites at Fahlun. By J. Berzelius (continued) 97 



Description of an improved Microscope for opaque Objects. By Mr. Hall. 



(With a Plate) 107 



On the Quantity of Rain, and Days of Rain, Snow, and Drizzle, at 



Viviers. By M. Flaugergues. (With a Plate.) 108 



Approximate Values of the Radii of Curvature, &c. of the Elliptic Arcs of 



an oblate Spheroid. By J. Adams, Esq 1 16 



On the Action of Lime upon Animal arid Vegetable Substances. By Mrs. 



Ibbelson 125 



On the indigenous Plants in the North of England. By Mr. Winch 129 



Analytical and Critical Account of the History and Present State of Galva- 

 nism. By John Bostock, M.D. F.R.S 132 



Proceedings of the Royal Society, June 10, 17, 24, and July 1 139 



Geological Society, March 19, and April 2 140 



Method of obtaining Nickel in a State of perfect Purity and Malleability. 



By E. D. Clarke, LL.D 142 



On the Method of procuring pure Nickel 1 44 



Acetate of Ammonia 145 



Urine of the Sow 146 



Gum Bassora 146 



Sulphate of Lime 147 



Zircon 147 



Cast-Iron rendered malleable 148 



On an Aluminous Chalybeate Spring on the Coast of Sussex. By Mr. 



Cooper 148 



Vindication of the Description of the horizontal Moon given by Dr. Clarke 



in his Travels 149 



Lake Ourmia, or Urumea, in Persia 150 



Temperature of June 151 



Singular Effect of Peruvian Bark 152 



Vaccination in Denmark 153 



New Instrument 153 



Death of Professor Play fair 153 



Col. Beaufoy's Magnetical and Meteorological Observations for June J 54 



Mr. Howard's Meteorological Journal, May 1 6 to June 14 157 



— June 14 to 30 159 



NUMBER LXXXL— SEPTEMBER. 

 A Tribute to the Memory of the late Thomas Henry, F.R.S. By William 



Henry, M.D. F.R.S 161 



