11 CONTENTS. 



PAGE 



Art. VII. On Lamprey Eels — (Petromyzontidse) — and 

 their Embryonic Development and Place in the 

 Natural History System, . . . .242 



VIII. On Fossil Rain Drops, .... 246 



IX. On the Fossil Crocodilia of England, . . 248 



X. On the Incrustation which forms in the Boilers of 

 Steam-Engines, from a Letter addressed to Dr G. 

 Wilson, F.R.S. By John Davy, M.D., F.R.S., 

 Inspector-General of Army Hospitals. Communi- 

 cated by the Author, . . . . 250 



XI. Remarks on a Bone Cave near the Mouth of the 

 North Esk. By Mr Alexander Bryson. Com- 

 municated by the Author, . . . 253 



XII. On the Geography and Geology of the Peninsula of 

 Mount Sinai and the adjacent Countries. By 

 John Hogg, M.A., F.R.S., F.L.S. ; Honorary 

 Secretary of the Royal Geographical Society, &c. 

 Communicated by the Author. — Concluded, 255 



XIII. Proceedings of the British Association at Edin- 

 burgh, in July and August 1850, . . 275 



Officers for 1850. — The General Meeting, Wednesday, 31st July, in 

 the Music Hall, — Evening, 275. — The President's Address, 276 

 to 297. 



Section A. — Mathematical and Physical Science, 

 296, 327, 341, 362. 



B. — Chemistry, including its application to Agri- 

 culture and the Arts, 306, 328, 346, 365. 



C. — Geology and Physical Geography, 308, 

 330, 348, 367. 



D. — Natural History, including Physiology, 

 314, 336, 352, 370. 



E.— Ethnological Sub-Section, 318, 338, 352, 

 372. 



Physiological Sub-Section, 362, 373. 



