CONTENTS. vn 



NUMBER LV— NOVEMBER. 



PaRe 

 Dr. Gregory on a volatile Liquid procured from Caoutchouc 

 by Destructive Distillation ; with Remarks on some other 



Empyreumatic Substances 321 



Dr. Henry's Experiments on Gaseous Interference 324 



Prof. Young's simple Method of proving the Law of Gravita- 

 tion 333 



Mr. J, T. Graves's Explanation of a remarkable Paradox in 



the Calculus of Functions, noticed by Mr. Babbage 334- 



Mr. J. Bishop's Experimental Researches into the Physiology 



of the Human Voice {concluded) 342 



Mr. W. C. Williamson on the Limestones found in the Vicinity 



of Manchester {concluded) 34-8 



Dr. J. Mitchell on the Beds immediately above the Chalk in 



the Counties near London •. 356 



Mr. J. Saxton on his Magneto-electrical Machine ; with Re- 

 marks on Mr. E. M.Clarke's Paper in the preceding Number 360 

 Mr. W. Hopkins's Reply to Dr. Boase's " Remarks on Mr. 

 Hopkins's ' Researches in Physical Geology'," in the Num- 

 ber for July (concluded) 366 



Prof. Young's Addendum to Article LXV. in the present 



Number 370 



New Books : — Maund's Botanist 371 



M. Gaudichaud's Vegetable Physiology 372 



Proceedings of the Royal Society 376 



• Geological Society 382 



'■ Zoological Society 388 



Ehrenberg's Fossil Infusoria 392 



Mr. W. R.Birt's Meteorological Observations made during the 



Solar Eclipse of May 15, 1836, at Greenwich 393 



On a new Species of Acetate of Copper 395 



Facts relative to the History of ^Ether 395 



Has Heat Weight ? 396 



Dr. Hudson's Reply to Dr. Apjohn's Paper inserted in the Phi- 

 losophical Magazine for September 398 



Fuseli's Portrait of Priestley 398 



Meteorological Observations 399 



NUMBER LXVL— DECEMBER. 



.Mr. H. F. Ta'bot's Facts relating to Optical Science. No. IV. 401 

 Mr. R.C. Taylor on the Carboniferous Series of the United 



States of North America 407 



Mr. F. O. Ward's Physiological Remarks on certain Muscles of 



the Upper Extremity, especially on the I'ectoralis Major . 411 

 Mr. J. Tovcy's Researches in the Undulatory Theory of Light, 



in continuation of former Papers 420 



