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CONTENTS. Va 



Page 



^^ UMBER XXVIII.— APRIL. 



Biographical Account of Sir B. Thomson, Count Rumford. By Dr. 



Thomson 241 



On Dew. By Dr. Wells 23 1 



Experiments on the Definite Proportions of the Elements of Organic Na- 

 ture. By Dr. Berzelius, concluded 260 



An Essay on Rents in the Earth. By Mr. Longniire, continued 275 



Experiments on Green Uran Mica. Bv Mr. Gregor 281 



Register of the Weather, and Table of Variations, at Plymouth, for tlie 



First Six Months of 1814 284 



Astronomical and Magnetical Observations. By Col. Beanfoy 289 



Mr. Phillips's Reply to Mr. Hume's Answer to his Animadversions 292 



Memoir on Iodine. By M. Gay-Lussac, continued 2g(> 



Critical Analysis of Dr. Berzelius's System of Mineralogy 302 



Proceedings of the Royal Society, Feb. 23, March 2, 9, and 16 307 



— ^— — ^— — Linnaean Society, March 7 308 



Geological Society, Jan. 20 to March 3 8O9 



Notices of Lectures 312 



Account of the Death of Mr. Smithson Tennant ibid. 



Dr. Seetzen's Travels ibid. 



Reply 10 Queries respecting Gas Light, Conveyance of Steam by Pipes, 



and smallest Angle at which Objects are visible 313 



Mete«rolo?;ical Table at Kinfauns Castle for 1814 314 



Royal Medical Society of Edinburgh 315 



Mr. LocUhart on Imaginary Cube Roots ibid. 



Mr. Walker on the Use of the Cerebellum and Spinal Marrow 3l6 



Mr. Hannah on Organic Remains in Plymouth Lime-stone 318 



Meteorological Table and Observations, Feb. 1 to March 1 319 



NUMBER XXIX.— MAY. 



Biographical Account of Dr. Joseph Black. By Dr. Thomson 321 



On the Doctrine of Fluxions. By A. CI risiison, Esq. 327 



On detecting Carbureted Hydrogen Gas in Coal Mines. By Mr. Longmire 332 



Population of the United States in 1810 336 



On the Effect produced by a Mass of Ice on a Thermometer. By Mr. 



Davenport ' 3.38 



On the Cerebellum. By Dr. Leach 345 



On Pyrophorus, and the making of Potassium. By Dr. Hamel S48 



On the Manufacture of Flour from Potatoes. By Mr. Whately 3.01 



Astronomical and Magnetical Observations. By Col. Beaufoy 363 



On the Uses of the Dorsal Vessel. By M. Marcel de Serres, continued. . 36g 

 Analytical Account of Dr. Prichard's Researches into the Physical His- 

 tory of Man 379 



■ Orfila's Treatise on Poisons 382 



Proceedings of the Royal Society, April G, 13, and 20 387 



■— Linnacan Society, April 4 and 18 39O 



Geological Society, i\Iarch 1? and April 7 ibid. 



Notices of Lectures 39S 



Answer to Queries respecting Gas Light ibid. 



Of Toads in Rocks, &c 393 



Mr. Pring on llic I'oral Powers of the Eye ibid. 



Proposed Road ovir Hounslnw Heath 394 



Dr. Tiarks in Rr|)ly to Mr. Lo( khart's Pajicr on Imaginary Cube Roots., ibid. 

 Another Cotumuuicatiou on the same Subject 395 



