724 
INDEX. 
Cayley (A.). A Ninth Memoir on Quantics, 17. — Reproduction of his original theory as to the number 
of irreducible covariants, 18; new formulae for the number of asyzygetic covariants, 20; the 23 
fundamental covariants, 23; tables of covariants, 31 ; Gordon’s proof for the finite number of the 
covariants of a binary quintic, 45. 
On the Problem of the In-and-Circumscribed Triangle, 369. 
Ceratodus, 511 (see Gunther). 
Cinchona, chemical and physiological experiments on living, 1 (see Broughton). 
Covariants, 18 (see Cayley). 
Cyclides, 585 (see Casey). 
E. 
Earth’s crust, constitution of, 335 (see Pratt). 
Eclipse, total, chemical intensity of total daylight during, 467 (see Roscoe). 
Electricity , new method of obtaining, from mechanical force, 129 (see Varley). 
F. 
Fluoride of silver, 321 (see Gore). 
Fossil plants of coal-measures, 477 (see Williamson). 
Frog, development of the skull in, 137 (see Parker). 
G. 
Ganoid fishes, 511 (see Gunther). 
Gibson (J. C.) and Barclay (T.). Measurements of Specific Inductive Capacity of Dielectrics, in the 
Physical Laboratory of the University of Glasgow, 573. 
Gordon (Prof.). Sketch of his proof for the finite number of binary quintics, 45. 
Gore (G.). On Fluoride of Silver. — Part II., 321. 
Gunther (A.). Description of Ceratodus, a genus of Ganoid Fishes, recently discovered in rivers of 
Queensland, Australia, 511. — For contents, see p. 511. 
I. 
Induction, electrostatic, relation between, and the decomposition of water, 129 (see Varley). 
K. 
Kew, magnetic observations at, 307 (see Sabine). 
M. 
Magnetic observations at Kew, discussion of, 307 (see Sabine), 
Magnetic observations made at Stonyhurst, 69 (see Perry). 
Maskelyne (N. S.). On the Mineral Constituents of Meteorites, 359. — The Breitenbach meteorite, 
359 ; bronzite, 360 ; silica crystallized in the rhombic system, 361 ; iron of meteorite, 365 ; the 
Shalka aerolite, 366. 
Meteorites, constituents of, 359 (see Maskelyne). 
