1138 
INDEX. 
Boole (G.). On Simultaneous Differential Equations of the First Order in whieh the Number of 
Variables exeeeds by more than one the Number of the Equations, 437. — Connexion between 
ordinary and partial differential equations, 437 ; number of integrals of a system of differential 
equations of the first order and degree, 440; general rule, 448; applications, 450. 
Boric ethide, 168; methide, 176. 
Bovey Tracey, lignites and clays of, 1019; fossil flora of, 1037. 
Bowekbank. (J. S.). On the Anatomy and Physiology of the Spongiadae. — Part II., 747. — Keratode, 747 ; 
membranous tissues, 750; fibrous structures, 751; cellular tissue, 759; sarcode, 760; organization 
and physiology, 762; the skeleton, 762; spicula, 763; canals and cavities, 785; dermal mem- 
brane, 791 ; pores, 793 ; oscula, 795 ; inhalation and exhalation, 796 ; nutrition, 801 ; cilia and 
ciliary action, 805; reproduction, 808; gemmules, 816; propagation by sarcodous division, 819; 
growth and development, 821 ; explanation of the plates, 822. 
On the Anatomy and Physiology of the Spongiadge. — Part III. On the Generic 
Characters, the Specific Characters, and on the Method of Examination, 1087. — Generic characters, 
1089; arrangement of the genera, 1097; discrimination of the species, 1122; preservation and 
examination of the Spongiadae, 1130; explanation of the plates, 1134. 
Brodie (B. C.). On the Oxidation and Disoxidation effected by the Alkaline Peroxides, 837. 
C. 
Carbon, spectrum of, 221, 885. 
Catalytic action, 838 (see Brodie). 
Cayley (A.). On Tschirnhausen’s Transformation, 561. — Addition, relative to a memoir " On a New 
Auxiliary Equation in the Theory of Equations of the Fifth Order,^^ 578. 
On the Analytical Theory of the Conic, 639. — Single conic, 640 ; single conic in con- 
nexion with a point or line, 645 ; with an iueunt or a tangent of a conic of double contact, 655 ; 
two conics, 658; addition, 661. 
Cerebrum of the Quadrumana, 185. 
Clarke (J. L.). Researches on the Development of the Spinal Cord in Man, Mammalia, and Birds, 
911. — General I’emarks, 930; explanation of the plates, 934. 
Cleland (J.). On the Relations of the Vomer, Ethmoid, and Intermaxillary Bones, 289. — Explanation 
of the plates, 318. 
Cohex (A.). On the Differential Coefficients and Determinants of Lines, and their Application to 
Analytical Mechanics, 469. 
Conic, analytical theory of the, 639 (see Cayley). 
Contact of Curves, 41. 
D. 
De la Rue (W.). The Bakerian Lecture. On the Total Solar Eclipse of July 18, 1860, observed at 
Rivabellosa, near Miranda de Ebro, in Spain, 333. — Introduction, 333; determination of geogra- 
phical position, 341; observations of the eclipse, (1) by the eye, 350 — (2) by photography, 362; 
solar spots, 395 ; photographs of the totality, 399 ; measurements of these, 407 ; appendix (recom- 
mendations), 415. 
Dicynodont reptilia, 455 (see Owen). 
Differential equations, 437 (see Boole). 
Dynamic radiation and absorption of heat by gases, 75. 
