vi 
Gwythee E. F., M.A.— On the different arranj^ements in a state 
of maximum density of equal spherical grannies, p. 35. The 
diffraction of a plane polarised wave of light, p. 78. 
Heedman Peofessoe.— On the results of the work underbaken by the 
Liverpool Marine Biology Committee, p. 101. 
Hodgkinson a., B.Sc., M.B.— The humming of the Snipe, p. 183. On 
the Diffraction of Microscopic Objects in relation to the Resolving 
Power of Objectives, p. 233. 
Ka.y Thomas. — On some Light Phenomena observed on Lake 
Windermere, November 22nd, 1885, p. 199. 
Melvill James Cosmo, M.A,, P.L.S. — On Hypocephalus Armatus 
(Desm.), p. 223. 
Muephy John Joseph. — On the meaning of Addition and Subtraction 
in Logic, p. 8. 
Eeynolds Peopessor Osboene, LL D., P.E S. — On the Flow of Gases, 
p. 55. On the Different Arrangements of Equal Spherical 
Granules, so that the mean density may be a maximum, p, 95. 
ScHUSTEE Aethue, F.E S. — Oil the Diurnal Period of Terrestrial 
Magnetism, p. 119. 
Stewaet Peofessoe Balfoue, LL.D., F.E.S. — On the forces concerned 
in iiroducing the Solar Diurnal Inequalities of Terrestrial 
Magnetism, p. 115. 
Stieeup Maek, F.G.S. — On the Conglomerate beds of the old red 
sandstone at Dunottar Castle, Kincardineshire, ii. 41, 
Thomson William, F.E.S.E., F.C.S. — On the determination of the 
Calorific power of fuel by direct Combustion in Oxygen, p. 214. 
Wilde Heney. — On the Velocity with which Air rushes into a Vacuum, 
and on some Phenomena attending the Discharge of i tmospheres 
of higher into Atmospheres of lower Density, p. 17, Note on 
the Velocity with which Air rushes into a Vacuum, and on some 
Phenomena attending the Discharge of Atmospheres of higher 
into Atmospheres of lower Density, p. 38. On the Efflux of Air 
as modified by the Form of the discharging Orifice, p. 207. 
