604 
Index. 
Brewster (Sir David), Description of 
a Double and Triple Holophote, 
and of a Method of Introducing 
the Electric and other Lights, 157. 
Opening Addresses, 2. 173. 
Obituary Notice of, 282. 
Minute in reference to his 
Death, 284. 
on the Figures of Equilibrium 
of Liquid Films, 311. 
Broun (J. Allan), Note upon a 
Method of Varying Weights by 
Minute Quantities, 167. 
on the Diurnal Variations of 
the Magnetic Declination near the 
Magnetic Equator, and in both 
Hemispheres, 168. 
Brown (Dr A. Crum), Note on the 
Action of Ammonia on Dichlorace- 
tone, 75, 133. 
on an Application of Mathe- 
matics to Chemistry, 89. 
on Chemical Structure, 518. 
Brown (Dr A. Crum) and Dr T. R. 
Fraser on the Changes produced 
by direct Chemical Additions on 
the Physiological Action of certain 
Poisons, 228, 461, 556. 
on the Physiological Action 
of the Salts of Ammonium Bases 
derived from Atropia and Conia, 461 
(Professor A. Crum) and Dr 
T. R. Fraser on the Physiological 
Action of the Salts of Ammonia, of 
Tri-methylamine, and of Tetra- 
methyl -ammonium ; of the Salts 
of Tropia, and of the Ammonium 
Bases derived from it ; and of Tro- 
pic, Atropic, and Isatropic Acids 
and their Salts, &c., 556. 
— on the Physiological Action 
of the Salts of Methyl-Strychnium 
and of Ethyl-Strychnium. 556. 
Brown (Rev. Thomas) on the Arctic 
Shell - Clay of Elie and Errol, 
viewed in connection with our 
other Glacial and more recent 
Deposits, 107. 
Bryson (Alexander), Obituary Notice 
of, 189. 
Buchan (Alexander), the Mean Pres- 
sure of the Atmosphere over the 
Globe for the Months and for the 
Year. Part I. — January, July, 
and the Year, 303. 
on the Determination of 
Heights, chiefly in the Interior of 
Continents, from Observations of 
Atmospheric Pressure, 465. 
Buchan (Alexander) on the Mean 
Pressure of the Atmosphere and the 
prevailing Winds for the Month 
and for the Year. Part II., 523. 
Burning Mirrors of Archimedes, and 
on the Concentration of Light pro- 
duced by Reflectors, 232. 
Burt (John G. M.), Obituary Notice 
of, 282. 
Cable-Testing, Address on, 454. 
Calabar Bean, Physiological Action of 
the, 51. 
Calabar Bean and Belladonna, An- 
tagonism between the Actions of, 
587. 
Campbell (John A.), Obituary Notice 
of, 20. 
Catton/A. R.), Note on a former Paper 
on the Theory of Double Refrac- 
tion, 159. 
on the small Oscillations of 
Heterogeneous Interpenetrating 
Systems of Particles, which act upon 
each other according to Laws de- 
pendent only on their Mutual Dis- 
tances, 165. 
on the Theory of the For- 
mation of Ammonia when Nitro- 
gen and Aqueous Vapour are 
passed over Magnesium, 536. 
Cay (John), Obituary Note of, 19. 
Cayley (Professor) on Polyzomal 
Curves, 217. 
Centres, Faisceaux, and Envelopes of 
Homology, 134. 
Centrifugal Governors, Intensified 
Gravity in, 477. 
Chemical Structure, 518. 
Christison (Professor), Opening Ad- 
dress, 392. 
Notice of a remarkable Mirage 
observed in the Firth of Forth, 
472. 
Colour and Motion on Films of Alco- 
hol, Volatile Oils, and other Fluids, 
108. 
Comets, 553. 
Conia and Atropia, Physiological 
Action of the Salts of the Ammo- 
nium Bases derived from, 461. 
Council, 1866-67, 1867-68, 1868-69, 
1, 173, 391. 
Cousin (Victor), Obituary Notice of, 
190. 
Craigie (David), Obituary Notice of, 
15. 
Cryptogamic Plants, Spores of, and 
Reproductive Process in, 294. 
