iv CONTENTS. 



Page 



NUMBER II.— FEBRUARY. 

 Mr. Baily on some new auxiliary Tables for determining the 



apparent Places of Greenwich Stars 81 



Mr. Ivory's Investigation of the Heat extricated from Air when 



it undergoes a given Condensation - • • 89 



The Bakerian Lecture. Sir Humphry Davy on the Relations 



of Electrical and Chemical Changes (continued) 94; 



Mr, Thomson's Mode of Heating Water for a Bath 104- 



Mr. Graham on the Finite Extent of the Atmosphere 107 



Mr. R. Phillips on the Triple Prussiate of Potash 110 



Rev. J. B. Emmett on Capillary Attraction 115 



Rev. J. B. Emmett on bleaching and preparing Flax 119 



Mr. Haworth's Description of New Succulent Plants 120 



Mr. John Taylor on the Accidents incident to Steam Boilers. . 126 



Mr. Levy on the Crystalline Forms of Wagnerite 13'3 



Mr. Galbraith on Capt. Parry's and Lieut. Foster's Experi- 

 ments for ascertaining the Velocity of Sound at Port Bowen 136 



Proceedings of the Geological Society 136 



— Astronomical Society 140 



Chlorine in the Native Black Oxide of Manganese l^^ 



Phosphorus in Kelp — Decomposition of Oxalic Acid by Sul- 

 phuric Acid — Phosphorescent Fluor Spar — Perkins's High- 

 Pressure Engines — Formation of Oleic and Margaric Acids 



from Fat 143 



Separation of the colouring Matter of Madder 144 



Bismuth Cobalt Ore — Iserine and Iron Sand in Cheshire — 



Experiments on certain Oxalates 145 



Seidlitz Powders ] 46 



Jet discovered in Wigtonshire — Origia of the Diamond 147 



Harbour of Ko-si Chang 149 



Rivers of Assam 151 



New Patents — Scientific Books 152 



Dr. Burney's Results of a Meteorological Journal for the Year 



1826, kept at Gosport, Hants 153 



Meteorological Observations by Mr. Howard near London, 

 Mr. Giddy at Penzance, Dr. Burney at Gosport, and Mr. 

 Veall at Boston 160 



NUMBER III.— MARCH. 



Biographical Notice of M. Piazzi 161 



Mr. Ivory's Continuation of the Subject relating to the Absorp- 

 tion and Extrication of Heat in a Mass of Air that changes 

 its Volume 165 



Mr. Ivory's Notice relating to the Seconds Pendulum at Port 

 Bowen 170 



Mr. Graham's Account of M. Longchamp's Theory of Nitri- 

 fication ; with an Extension of it 172 



Mr. Swainson's Sketch of the Natural Affinities of the Lepi- 

 doptera Diurna of Latreille 180 



Mr. W. Phillips on the Crystalline Form of the Hyalosiderite. . 188 



