CONTENTS. Vll 



Page 



On recent Conglomerate formed on the Sea-coast around Iron, 



by H. N. Nevins 446 



Scientific Memoirs, Part X 447 



Meteorological Observations for March 1842 447 



Table 448 



NUMBER CXXXIII.— JUNE. 



Mr. A. Milward's Observations on the Action of Light on Re- 

 volving Discs 449 



Mr. W. Brown on the Influence of Atmospheric Currents upon 



the Height of the Barometer 457 



Mr. W. Brown on the Differences of the mean Pressure of the 



Atmosphere on different Latitudes 469 



Prof. Booth on the Volume of a Segment of a Surface of the 



Second Order, bounded by parallel Planes 472 



Mr. Drach on the Horary Deviations of the Barometer, as ob- 

 served at Plj'mouth 477 



Mr. G. Gulliver's Contributions to the Minute Anatomy of 



Animals 480 



The Rev. M. O'Brien's Reply to some Observations of Professor 



Kelland in the Philosophical Magazine for May 1842 484 



Mr. R. King on the unexplored Coast of North America .... 488 

 Mr. E. Schunck on some of the Substances contained in the 



Lichens employed for the preparations of Archil and Cudbear 495 

 Mr. A. B. Garrod on the Conversion of Benzoic Acid into Hip- 



puric Acid in the Animal CEconomy 501 



Proceedings of the Royal Society 504 



Geological Society 512 



On Iodine in Commercial Nitric Acid 529 



On the Preparation of Hydrobromic and Hydriodic Acid, by 



• M. Mellon • 529 



Quantitative Determination of Phosphoric Acid 530 



New Minerals : — Andesine ; Albite ; Leucophan ; Mosandrite ; 



Saponite ; Praseolite ; Esmarkite ; Aphrodite 530 



Coral Reefs 534 



Mr. Lonsdale 535 



Meteorological Observations for April 1842 535 



Table 536 



NUMBER CXXXIV.— SUPPLEMENT TO VOL. XX. 



Mr. R. Warington on a Re-arrangement of the Molecules of a 

 Body after Solidification 537 



Mr. Graham on the Constitution of the Sulphates as illustrated 

 by late 'ITiermometrical Researches 539 



