422 
I N 1) E X. 
D. 
Definite integrals, on the theory of, 157. 
Diamagnetic force, on the, 1 (see Tyndall). 
Differential equations, on a class of, 299 (see Donkin). 
Donkin (W. F.). On a Class of Differential Equations, including those which occur in Dyna- 
mical Problems. Part II., 299. — On the variation of elements, 304 ; transformation of variables 
— definition of normal transformations, 213 ; transformation of coordinates, 317 ; trans- 
formation from fixed to moving axes, 322; differential equations of the planetary theory, 
330 ; application to the problem of Three Bodies, 337 ; appendices, 349. 
Dragon-fiy , experiments on the respiration of the, 139 (see Barlow). 
Dynamical problems, on the differential equations which occur in, 299 (see Donkin). 
E. 
Egypt, excavations in, 105 (see Horner). 
F. 
Frankland (E.). Researches on Organ o-metallic Bodies. Second memoir, Zincethyle, 259. — 
Action of oxygen upon zincethyle, 267 ; of iodine, 271 ; of bromine, 273; of chlorine, 273; 
of sulphur, 273; of water, 274. 
G. 
Gasteropoda, 2S9, 295 (see Macdonald). 
Geodetic surveys, disturbance of the apparent astronomical latitude in, by mountain attraction, 
53, 101 (see Pratt. Airy). 
Gladstone (J. H.). On Circumstances modifying the Action of Chemical Affinity, 179. — Ferric 
sulphocyanide, 182; dependence of the amount of the coloured salt on other substances in 
the solution, 183, 192; the colour not dependent on the original arrangement of the consti- 
tuents, 185 ; influence of mass of one of the substances that produce the salt, 186 ; other ferric 
salts, 192; gold, &c. salts, 204; organic substances, 209; general inferences, 212 ; testimony 
from other chemical phenomena, 214. 
H. 
Himalaya mountains, attraction of the, 53 (see Pratt). 
Hooker (J. D.) and E. W. Binney. On the Structure of certain Limestone Nodules enclosed in 
seams of Bituminous Coal, with a Description of some Trigonocarpons contained in them, 
149. 
Horner (L.). An Account of some recent Researches near Cairo, undertaken with the view of 
throwing light upon the Geological History of the Alluvial Land of Egypt, 105. — Physical 
Geography and Geological Structure of Egypt, 109; inundations of the Nile, 114; solid 
matter conveyed by tbe Nile, 117; the recent researches, 119; excavations at Heliopolis, 
123; description and analyses of the soils, 124; descriptions of the several pits sunk, 131 ; 
synopsis of the soils sunk through, 137. 
