IV CONTENTS. 



NUMBER XXXVIII.— AUGUST. 



Page 

 Mr. Charlesworth's Observations on the Crag-formation 

 and its Organic Remains ; with a View to establish a Divi- 

 sion of the Tertiary Strata overlying the London Clay in 



Suffolk 81 



Dr. Hodgkin on the Importance of Studying and Preserving 

 the Languages spoken by Uncivilized Nations, with the view 

 of elucidating the Physical History of Man (concluded) . . 94? 



Mr. F. Watkins on Magneto-electric Induction 107 



Mr. Talbot on the Nature of Light 113 



Suggestions respecting the ensuing Meeting of the British As- 

 sociation for the Advancement of Science 118 



Prof. Encke on Olbers's Method of determining the Orbits of 



Comets (continued) 123 



New Books : — Royle's Illustrations of the Botany and other 

 branches of the Natural History of the Himalayan Moun- 

 tains, and of the Flora of Cashmere 132 



Proceedings of the Royal Society 136 



' Geological Society 142 



Zoological Society 152 



Composition of Iodide of Iron 156 



Parallel, by Newton, upon the Corpuscular Theory, to Mr. 

 Talbot's Explanation of certain Phenomena of Incandes- 

 cence, upon the Undulatory Theory 157 



Scientific Association of Germany: Meeting at Bonn from 



September 17th to 27th 157 



M. Liebig on Phosphuret of Azote 158 



Crystalline Form of Kupferbliithe 159 



Temperature of Vapours from boiling Solutions 159 



Meteorological Observations 160 



NUMBER XXXIX.— SEPTEMBER. 



Mr. Lubbock on the Double Achromatic Object Glass 161 



Mr. C. B. Rose's Sketch of the Geology of West Norfolk 171 

 Mr. Dalmahoy on the greater calorific Effect of the Sun's di- 

 rect Rays in high than in low Latitudes 182 



On Taylor's Theorem . . . , 288 



Mr. Carter on the Ancient and Modern Formation of Deltas 

 in the Persian Gulf by the Euphrates and Tigris, in answer 



to Mr. Beke 192 



Mr. G. B. Jerrard on certain Transformations connected with 

 the finite Solution of Equations of the Fifth Degree 202 



