CONTENTS OF VOL. XXIV. 



(THIRD SERIES.) 



NUMBER CLVI.— JANUARY, 1844. 



Page 

 Dr. D. P. Gardner on the Action of Yellow Light in producing 



the Green Colour, and Indigo Light the Movements of Plants 1 

 Prof. De Morgan on the Reduction of a Continued Fraction to 



a Series 15 



Messrs. R. Warington and W. Francis on the Action of Alkalies 



on Wax 17 



Dr. G. Fownes on the Action of Oil of Vitriol upon Ferrocya- 



nide of Potassium 21 



Mr. S. Tebay's Demonstration of the Rule of Descartes 24 



J. J.'s Observations on the Notations employed in the Differen- 

 tial and Integral Calculus 25 



Note on the Experiments of Moser. (Extract from the Gior- 



nale Toscano di Scienze Mediche, Fisiche, &c.) 38 



Mr. J. Denham Smith's Note on the Paper published in the 

 Philosophical Magazine for September 1843, " On the Com- 

 position of an Acid Oxide of Iron (Ferric Acid) " 41 



Dr. Martin Barry's Remarks on a Work by Prof. Bischoff of 

 Heidelberg, entitled " Entwickelungsgeschichte des Kanin- 

 chen-Eics " (History of the Development of the Ovum of the 



Rabbit), 1842 42 



Mr. G. Salmon on the Properties of Surfaces of the Second 

 Degree which correspond to the Theorems of Pascal and 



Brianchon on Conic Sections 49 



Proceedings of the Geological Society 51 



London Institution 76 



Preparation of Hyposulphite of Soda, by M. Walchner 78 



On the Action of Chlorides upon Protochloride of Mercury, by 



M. Mialhe 78 



Meteorological Observations for November 1843 .... 79 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 London ; by Mr. Veall at Boston ; by the Rev. W. Dunbar at 

 Applegarth Manse, Dumfries-shire; and by the Rev. C. 

 Clouston at Sand wick Manse, Orkney 80 



NUMBER CLVIL— FEBRUARY. 



Mr. II. Moon on the Undulatory Theory of Interference .... 81 

 The Rev. Brice Bronwin's Differential Equations of the Moon's 



Motion 85 



a'2 



