CONTENTS. VU 



Page 

 Analysis of crystallized Oligoclas from Arendal or Soda- 



Spoduraene, by Robert Hagen 398 



Action of Acids on Iodide of Sodium, by Justus Liebig 398 



Meteorological Society 399 



Meteorological Observations 399 



NUMBER XCI.— JUNE. 



Mr. Coathupe's Experiments upon the Products of Respira- 

 tion at different Periods of the Day 431 



Dr. D. Thomson and Mr. T. Richardson on the Decomposition 



of Amygdalin by Emulsin 414 



Mr. Trull on the Effects of Light and Air in restoring the faded 



Colours of the Raphael Tapestries 416 



Prof. J. D. Forbes on the Colours of the Atmosphere considered 

 with reference to a previous Paper " On the Colour of Steam 



under certain circumstances" 419 



Dr. Beke on the Alluvia of Babylonia and Chaldsea 426 



Mr. H. Prater's Observations on the Anti- Inflammable and 

 Anti-Dry Rot Powers of the Subcarbonate of Soda and other 



Salts 432 



Prof. Plateau's Answer to the Objections published against 

 a genertd Theory of the Visual Appearances which arise 



from the Contemplation of Coloured Objects 439 



On the polarized Condition of Platina Electrodes, and the 



Theory of secondary Piles 446 



Proceedings of the Geological Society, Linnaean Society, and 



Edinburgh Society of Arts 449 — 463 



New Books: — Lubbock's Elementary Treatise on the Tides; 

 Wallace's Geometrical Theorems and Analytical Formulae ; 



Faraday's Experimental Researches in Electricity 464 



Scientific Memoirs, Part V 472 



Preparation of Dichloride of Carbon, by M. Regnault 473 



Delvauxene, a new Phosphate of Iron 474 



On the Use of Ammonia in fixing Photographs, by J. C. Con- 

 stable, Esq 474 



Application to Photography of the Light of Incandescent Coke, 



by Mr. R. Mallet 475 



On the Composition of Idocrase, by H. Hess 476 



On the Compositioh of Idocrase from Slatoust, by F. Varren- 



trapp 477 



On Terrestrial Magnetism, by M. Quetelet 478 



Note on the Undulatory Theory of Light, by John Tovey. . . . 479 



Meteorological Observations 479 



Table 480 



