282 
INDEX. 
Cerotin, 1 60 ; distillation of, 1 66. 
Chitons, on the structure of, 141. 
Cotidal Lines, 2. 
D. 
Differential Equations, on the Solution of Linear, 31. I. General Theorems of the Calculus of 
Operations, ibid. II. Application of these Theorems to the solution of Equations, 33. 
III. Solution of equations by interchange of symbols alone, 38. IV. Application to Partial 
DilFerential Equations, 43. V. Connection with Definite Integrals, 44, VI. Linear Equa- 
tions in Finite Differences, 48. VII. Miscellaneous forms, 53. 
Diurnal Inequality , 33. From observations, 35. 
. E. 
Electricity, current, an experimental inquiry undertaken with the view of ascertaining whether 
any, and what signs of, are manifested during the organic process of Secretion in living 
animals, being an attempt to apply some of the discoveries of Faraday to Physiology, 343. 
Erythric Ether, 73. Methylic ether, 74. Picro-erythrin, 75. 
Evernia Prmiastri, Id. Evernic acid, Sd. Evernesic acid, 81. Evernesic ether, 84. 
Exhalation (of Plants), action of light on, 370. 
G. 
Glaisher (James, Esq.). On the corrections to be applied to the Monthly Means of Meteorolo- 
gical Observations taken at any hour, to convert them into Mean Monthly values, 135. 
Gray (J. E., Esq.). On the structure of Chitons, 141. 
H. 
Hargreave (Charles James, Esq.). On the Solution of Linear Differential Equations, 31. 
Heat, on the, disengaged during Metallic Substitutions, 91. Salts of Copper with Zinc, 93. 
Salts of Copper with Iron, 96. Salts of Copper with Lead, 97. Salts of Silver with Zinc, 98. 
Salts of Silver with Copper, 100. Salts of Mercury with Zinc, 101. Salts of Platinum with 
Zinc, 103. 
Hepatic Ducts, Microscopical examination of the contents of the, with conclusions founded 
thereon as to the Physiological Signification of the cells of hepatic parenchyma, and as to 
their anatomical relation to the radicles of the hepatic ducts, 377. 
I. 
Iguanodon, on the Structure of the Jaws and Teeth of the, 183. 
J. 
Jones (Henry Bence, M.D.). On a new substance occurring in the Urine of a patient with Mol- 
lities Ossium, 55. 
