CONTENTS. 



ART. PAGE 



X. Dr. Hastings on the Division of the Eighth Pair of 



Nerves <> 96 



XI. Meteorological Observations. By J. F. Daniell, 

 Esq., F.R.S., & M.R.I 97 



XII. An Account of some Observations and Experiments 

 made by Mr. Green, during his Ascent in a Balloon 

 on the 6th Sept. 1821. Communicated by R. H. 

 Solly, Esq., F.R.S. & M.R.I 114 



XIII. Proceedings of the Royal Society 119 



XIV. Analysis of Scientific Books 120 



Philosophical Transactions of the Royal Society of 



London, for the Year 1821, Part 1 120 



i. On the Black Rete Mucosum of the Negro, being a 

 Defence against the Scorching Effects of the Sun's Rays. 

 By Sir E. Home, Bart. F.R.S .'. . 125 



ii. On the Magnetic Phsenomena produced by Electricity, 

 in a Letter from Sir H. Davy, Bart. F.R.S., to W. H. 

 Wollaston, M.D. P.R.S 126 



iii. iv. Communications of Singular Facts in Natural His- 

 tory. By the Earl of Morton, F.R.S., and D. Giles, Esq. 126 



v. The Croonian Lecture. Microscopical Observations 

 on the following subjects : On the Brain and Nerves, shew- 

 ing that the materials of which they are composed exist in 

 Blood. On the discovery of Valves in the Branches of the 

 Vas Breve lying between the villous and muscular coats 

 of the Stomach. On the Structure of the Spleen. By 

 Sir EvERARD Home, Bart. V.P.R.S 127 



vi. On two New Compounds of Chlorine and Carbon, 

 and on a New Compound of Iodine, Carbon, and Hydrogen. 

 By M. Faraday', Chemical Assistant in the Royal 

 Institution 129 



vii. An Account of the Comparison of various British 

 Standards of Linear Measure. By Capt. H. Kater, F.R.S. 130 



viii. An Account of the Urinary Organs, and Urine of two 

 Species of the genus Rana. By John Davy, M.D. F.R.S. 130 



ix. An Account of a Micrometer made of Rock Crystal. 

 By G. Dollond, F.R.S 131 



