CONTENTS. Vll 



NUMBER XLII.— DECEMBER. 



Page 

 Sir G. S. Mackenzie on the Theory of the Parallel Roads of 



Glen Roy 433 



Sir D. Brewster on certain Peculiarities in the Double Refrac- 

 tion and Absorption of Light exhibited in the Oxalate of 



Chromium and Potash 436 



Mr. R. W. Fox's Remarks on the Laws of Magnetic Attrac- 

 tion . 439 



Dr. J.Inglis's Extracts from a Prize Essay on Iodine 441 



Dr. Boase's Inquiry into the Nature of the Structure of 



Rocks 445 



Prof. Young's Concise Method of determining the Function 



X 2 in the Application of Sturm's Theorem 454 



Mr. Lubbock on Bernoulli's Theory of the Tides 457 



Mr. R. Fitch on the Coralline Crag of Ramsholt and Orford. . 463 

 Mr. Charlesworth's Reply to Mr. Woodward's Remarks on 

 the Coralline Crag; with Observations on certain Errors 

 which may affect the Determination of the age of Tertiary 



Deposits 464 



Dr. Apjohn's Experimental Investigation of a Formula for 

 inferring the Dew-point from the Indications of the Wet- 

 bulb Hygrometer {concluded) , 470 



M. Melloni on the Transmission of Calorific Rays through 



Diathermal Bodies 475 



Mr. G. B. Jerrard on the Transformation of Equations {conti- 

 nued) , 478 



On the Cause of the " Coloured Bands" observed by A. R. . . 474 

 Official Report of the Proceedings of the British Association 

 for the Advancement of Science, at the Dublin Meeting, 

 August 1835; — Geology and Geography; Zoology and 



Botany ; Medical Science 480—515 



Proceedings of the Geological Society 515 



Linnsean Society 519 



Zoological Society 529 



SUPPLEMENTARY NUMBER. 



Proceedings of the Zoological Society {continued.) 521 



M.Henry Rose on the Evolution of Light during Crystallization 534 



Hydrate of Oil of Turpentine 537 



Action of Oxacids on Pyroxylic Spirit 538 



Berzelius, Preparation of pure Tellurium 539 



Prof. Bischoft', Analysis of the Plenakite 540 



