CONTENTS. iii 



PAGE 



VIII. Description of the Marine Telescope. By John Adie, 

 F.R.S.E., F.R.S.S.A. Communicated by the 

 Author, 117 



IX. Experimental Investigations to Discover the Cause of 

 the Change which takes place in the Standard 

 Points of Thermometers. By John Adie, 

 F.B.S.E., r.R.S.S.A. Communicated by the 

 Author, 122 



X. Observations on the Discovery, by Professor Lepsius, 

 of Sculptured Marks on Rocks in the Nile Valley 

 in Nubia ; indicating that, within the historical 

 period, the river had flowed at a higher level than 

 has been known in Modern Times. By Leonard 

 Horner, Esq., F.R.S.S. L. & E., F.G.S., &c. 

 Communicated by the Author. With a Plate, 126 



XI. On the Salmon Tribe (Salmonidfe) ; their Classifica- 

 tion, Geographical Distribution, &c., . . 144 



XII. Results of Observations made by the Rev. F. Fal- 

 lows, at the Cape of Good Hope, in the years 

 1849-30-31. Produced under the superintend- 

 ence of G. B. Airy, Esq., Astronomer Royal, 148 



XIII. Discovery of the Great Lake " Ngami" of South 



Africa, . . . . . . 150 



XIV. Dr Davy's Brief Sketch of the Geology of the West 



Indies. Communicated for the Philosophical 

 Journal, . . . . . . 168 



XV. On the Differences between Progressive, Embryonic, 

 and Prophetic Types in the Succession of Organ- 

 ized Beings through the whole range of Geological 

 times, ....... 160 



XVI. On a New Analogy in the Periods of Rotation of the 

 Primary Planets discovered by Daniel Kirkwood 

 of Pottsville, Pennsylvania, . . . 166 



