840 
INDEX. 
H. 
Hargreave (C. J., Esq.). General Methods in Analysis for the resolution of Linear Equations 
in Finite Differences and Linear Differential Equations, 261. 
Heat, mechanical equivalent of, 61. Friction of water, 66. Friction of mercury, 70-75. Fric- 
tion of cast iron, 77-80. 
Herschel (Sir J. F. W.). On the Algebraic Expression of the number of Partitions of which a 
given number is susceptible, 399. 
Higginbottom (John, Esq.). On the Influence of Physical Agents on the development of the 
Tadpole of the Triton and the Frog, 431. 
Hofmann (Dr. A. W.). Researches regarding the Molecular Constitution of the Volatile Organic 
Bases, 93. 
Hylceosauriis , on a dorsal dermal spine of, 391. 
Hystrix cristata, on the dental structures of, 552. 
I. 
India, meteorological observations in, 297. 
J. 
Jerboa jHgyptius, on the dental structures in, 544. 
Jones (Henry Bence, M.D.). Contributions to the Chemistry of the Urine. Paper IV. On the 
so-called Chylous Urine, 651. 
Joule (James P., Esq.). On the Mechanical Equivalent of Heat, 61. 
L. 
Ligamentum Rotundum Uteri, on the structure and use of, 515. 
Light, experiments and observations upon the properties of, 235. 
Linear Equations in Finite Differences and Linear Differential Equations. General methods 
in analysis for the resolution of, 261. Linear equations in finite differences, ibid. Solution 
of differential equations in series, 270. 
Liquid diffusion, characters of, 6. 
Liquids, on the diffusion of, 1. Supplementary observations, 805. 
Lyndon, on the mean monthly temperature at, 569. 
M. 
Madras, range of barometer at, 305. Temperature at, 324-331. Winds, 368. 
Magnesia, sulphate of, diffusion of, 43. 
Magnetic Observatories (British). On the means adopted therein for determining the absolute 
values, secular change, and annual variation of the magnetic force, 201 . Sources of irre- 
gularity in the indications of the Bifilar, 202, 203. Portable Unifilar Magnetometer, 204. In- 
struments employed at Toronto, 205. Monthly results, 208. Total Force, its mean value 
and secular change, 210. Annual variation, 211. 
Magnetometers , automatic registration of, 83. 
