Viil CONTKNTS. 



Prof. Berzelius on Meteoric Stones 129 



Mr. L. Thompson on a new Metlmd ofprepiiiiiig lodous Acid 442 

 Mr. J. T.Graves's Explanation of a remarkable Paradox in the 



Calculus of Functions, noticed by Mr. Babbage 4'4'3 



Dr. J. Inglis on the Conducting Power of Iodine for Electricity 450 

 Rev. J. W. MacGauley's Account and Explanation of some 

 remarkable Results obtained during a Course of Electro- 

 Magnetic Experiments 452 



On the Art of Glass- Painting 456 



Mr N. T. Wetherell's Observations on some of the Fossils of 

 the London Clay, and in particular those Organic Remains 

 which have been recently discovered in the Tunnel for the 



London and Birmingham Railroad 462 



Mr. G. Rainey's Reply to Dr. Ritchie's Remarks on Mr. 



Rainey's Theory of Magnetic Reaction 469 



Rev. N. J. Callan on a new Galvanic Battery 472 



Dr. Dalton's Observations on certain Liquids obtained from 

 Caoutchouc by Distillation 479 



SUPPLEMENTARY NUM!]ER. 

 Dr. Dalton's Observations on certain Liquids obtained from 



Caoutchouc by Distillation 481 



On Voltaic Electricity 484 



On the Constitution of Bitumens, by M. Boussingault 487 



Proceedings of the Geological Society 489 



■ Zoological Society 503 



_^ . Royal Society 522 



Artificial Production of Crystalhzed Minerals 537 



Direct Demonstration of the Rule for the Multiplication of 



Negative Signs 540 



On the Solubility of Carbonate of Lime, &c., in Hydrochlo- 



rate of Ammonia 540 



Method of detecting Sulphurous Acid in the Hydrochloric 



Acid of Commerce 543 



On Platina. By J. W. Dobereiner 544 



Meteorological Observations 544 



PLATES. 



I. A Portrait of the late Francis Xavier Baron von Zach, Director of 



the Observatory of Seeberg. 

 11, A Plate illustrative of Dr. Falconer and Capt. Cautley's Paper on 

 the Swatkerium gigantenyn, a newly discovered extinct animal, con- 

 necting the Rmninantia with the Pachydennntn. 



III. A Plate illustrative of Mr. J. Bishop's Experimental Researches into 



the Physiology of the Iliinian Voice. 



IV. A Plate illustrative of Mr. O. Ward's Physiological Remarks on the 



Motion of the Arm. 



