CONTENTS OF VOL. XXIV.— THIRD SERIES. VII 



NUMBER CLXI.— JUNE. 



Page 

 Prof. Graham's Experiments on the Heat disengaged in Com- 

 binations 401 



Prof. Latham's Facts and Observations relative to the Science 



of Phonetics (No. III.) 420 



Prof. Grove on the Gas Voltaic Battery. — Experiments made 

 with a view of ascertaining the rationale of its action and 



its application to Eudiometry {concluded) 422 



The Rev. J. A. Coombe on the Form of Equilibrium of an In- 

 extensible String laid on a surface and acted on by any forces 432 

 Mr. R. Hunt's Chromo-Cyanotype, a new Photographic Process 435 

 Sir D. Brewster on the Law of Visible Position in Single and 

 Binocular Vision, and on the representation of Solid Figures 

 by the union of dissimilar Plane Pictures on the Retina {con- 

 cluded) 439 



Proceedings of the Royal Society 455 



National Institute of the United States . . 468 



Observations on African Guano, by W. Francis 470 



Process for obtaining Iridium, by Mons. E. Fremy 474 



An Experiment for rendering apparent the Adjusting Power of 



the Eye, by Reuben Phillips 474 



Double Carbonate of Ammonia and Magnesia, by M. P. A. Favre 475 

 On the Identity of Scorodite and Neoctese, by M. Damour . . 476 

 Comparative analysis of Anatase and Rutile, by M. Damour . . 477 



Meteorological Observations for April 1844 479 



Table 480 



NUMBER CLXIL— SUPPLEMENT TO VOL. XXIV. 



Sir J. F. W. Herschel's Observations on the Entrance Passages 

 in the Pyramids of Gizeh 481 



Sir H. T De la Beche's Memorandum on Estuaries and their 

 Tides 485 



The Rev. Brice Bronwin on some Definite Integrals 491 



Mr. J. Denham Smith's Note on a paper on Ferric Acid, read 

 before the Chemical Society May 16, 1843 498 



Mr. J. T. Cooper's Observations on Catechuic Acid 500 



Mr. A. R. Arrott on a Class of Double Sulphates, containing 

 Soda and a Magnesian Oxide 502 



Mr. R. Warington on a curious Change in the Molecular Struc- 

 ture of Silver 503 



Mr. R. Warington's Note on a Means of Preserving the Crystals 

 of Salts as permanent objects for Microscopic Investigation . 505 



