IV 
Contents. 
PAGE 
On the Roots of g2= _ i. By Dr Gustav Plarr. Communicated by 
Professor Tait, . . . . . . .93 
On Vanishing Aggregates of Determinants. By Thomas Muir, LL.D., 96 
On a Simplified Proof of MaxwelPs Theorem. By Professor Burn- 
side. Communicated by Professor Tait, . . . .106 
On some Glass Globes with Internal Cavities produced during Cool- 
ing. By J. T. Bottomley, Esq,, ..... 108 
Investigations on the Malpighian Tubes and the “ Hepatic Cells ” 
of the Araneina; and also on the Diverticula of the Asteridea. 
By Dr A. B. Griffiths, F.R.S. Edin., and Alexander Johnstone, 
F.G.S. Bond, and Edin., . . . . . .Ill 
On the Thomson Effect in Iron. By Professor Tait, . .115 
Obituary Notices of former Vice-Presidents of the Society, . .116 
Problem in Relationship. By Professor A. Macfarlane, D.Sc., .116 
On Transition-Resistance and Polarisation. By W. Peddie, Esq., 
B.Sc., . . . . . . . .118 
The Change in the Thermoelectric Properties of Tin at its Melting 
Point. By Albert Campbell, Esq., B.A., . . . .125 
On the Thermoelectric Properties of Iron. By Professor Tait, . 1 27 
On the Constitution of Dielectrics. By W. Peddie, Esq., B.Sc., . 129 
On Mr Omond’s Observations of Fog-Bows. By Professor Tait, . 129 
Letter from the Astronomer-Royal on the Fall of a Part of the Cliff 
below Nelson’s Monument, . . . . . .130 
On the Causes of Movements in General Prices. By Professor 
Nicholson, . . . . . . . .130 
A New Method for Preserving the Blood in a Fluid State outside 
the Body. By Professor J ohn Berry Haycraft and E. W. Carlier, 
M.B., ' 130 
The Formula of Morphine. By R. B. Dott, Esq., F.I.C., and Ralph 
Stockman, M.D., ....... 131 
On the Fossil Flora of the Staffordshire Coal Fields. I. The Fossil 
Plants collected during the Sinking of the Shaft of the Hamstead 
Colliery, Great Barr, near Birmingham. By Robert Kidston, Esq., 
F.R.S.E., F.G.S., 135 
On a Monochromatic Rainbow. By John Aitken, Esq., . . 135 
On Neuropteris plicata, Sternb., and Neuropteris rectmervis, Kidston. 
By Robert Kidston, F.R.S.E., F.G.S., . . . .137 
Reflex Spinal Scratching Movements in some Vertebrates. By Prof. 
John Berry Haycraft, . . . . . .137 
Reply to Professor Boltzmann. By Professor Tait, . . .140 
On a Mode of Exhibiting the Action of the Semicircular Canals of 
the Internal Ear. By Professor Crum Brown, . . .149 
On the Temperature and Currents in the Lochs of the West of Scot- 
land, as affected by Winds. By Dr John Murray, . . 151 
