JV CONTENTS OF VOL. IX. — FOURTH SERIES. 



Page 

 M. R. Bunsen on the Law of Absorption of Gases. (With a 



Plate.) 116 



Prof. Challis on the Eccentricity of the Moon's Orbit 130 



W. H. M. on the Adjustment of Crystals for Measurement 



with the Reflective Goniometer 138 



Prof. Buff on Galvanic Circuits in which Perchloride of Iron 



enters as an Element 139 



Prof. Connell on the new Hygrometer or Dew-point Instrument. 143 

 Dr. Auderson on the Products of the Destructive Distillation of 



Animal Substances.— Part III 145 



Notices respecting New Books : — M. P. T. Riess's Treatise on 



Erictional Electricity 150 



Proceedings of the Royal Society 152 



On the Limit of Vaporization of Mercury, by C. Brame 157 



Meteorological Observations for December 1854 159 



Table 160 



NUMBER LVIIL— MARCH. 



Prof. Faraday's Further Observations on Associated cases, in 



Electric Induction, of Current and Static Effects 161 



Prof. Boole on certain Propositions in Algebra connected with 



the Theory of Probabilities 165 



Dr. Heddle's Analysis of the Mineral " Edingtonite " 179 



M. R. Bunsen on the Law of Absorption of Gases {concluded), . 181 

 Prof. Challis on the Theory of the Moon's Motion. — Explana- 

 tion of the occurrence of non-periodic Factors in the Deve- 

 lopment of the Radius-vector 201 



Dr. Tyndall on the Existence of a Magnetic Medium in Space. 205 

 The Rev. R. Carmichael's Theorems on the Quadrature of Sur- 

 faces and the Rectification of Curves 209 



Dr. Anderson on the Products of the Destructive Distillation 



of Animal Substances. — Part III. {concluded) 214 



Mr. W. Crookes on a more convenient form of applying Gallic 



Acid as a Developing Agent in Photography 225 



On the Gold Fish of Franklin : 227 



Proceedings of the Royal Society 229 



On the Object of Salt in the Sea, by Professor Chapman, of 



University College, Toronto 236 



On an Appearance seen in the Moon, by Robert Hart, Esq. . . 238 



Meteorological Observations for January 1855 239 



Table 240 



NUMBER LIX.— APRIL. 



Piof.W. Thomson's Elementary Demonstrations of Propositions 

 in the Theory of Magnetic Force 241 



