Vlll 
CONTENTS. 
On the Development of the Flower of Pinguicula vulgaris, L., with 
Remarks on the Embryos of P. vulgaris, P. grandiflora, P. lusita- 
nica, P. caudata, and Utricularia minor. By Alexander Dickson, 
M.D., Edinburgh and Dublin, Regius Professor of Botany in the 
University of Glasgow, . . . . . .531 
Observations on New Lichenicolous Micro-Fungi. By Dr W. Lauder 
Lindsay, ........ 534 
On the Theory of the Formation of Ammonia when Nitrogen and 
Aqueous Vapour are passed over Magnesium. By A. R. Catton, 
M.A., . . . . . . . .536 
Influence of the Vagus upon the Vascular System. By William 
Rutherford, M.D., Demonstrator of Practical Physiology in the 
University of Edinburgh, . .... . 538 
On Free An-atomic or Transmissible Power. By R. S. Wyld, Esq. 
{Second Paper), . . . . . . .539 
On the Affinities and Classification of the Nemerteans. By W. C. 
MTntosh, M.D., ....... 545 
On the Alkaloids contained in the Wood of the Bebeeru or Green- 
heart Tree {Nectandra Rodicei, Schomb.) By Douglas Maclagan, 
M.D., F.R.S.E., Professor of Medical Jurisprudence in the Uni- 
versity of Edinburgh, and Arthur Gamgee, M.D., . . . 548 
On the Basin of the Firth of Forth, and some of its Geological 
Phenomena. By David Milne-Home, Esq., . . . 550 
On Comets. By Professor Tait, ..... 553 
Hegel and the Metaphysics of the Fluxional Calculus. By W. R. 
Smith, Esq. Communicated by Professor Tait, . . . 555 
On the Connection between Chemical Constitution and Physiological 
Action : — 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 
Tropic, Atropic, and Isatropic Acids and their Salts. With further 
details on the Physiological Action of the Salts of Methyl-Strych- 
nium and of Ethyl-Strychnium. By Professor A. Crum Brown and 
Dr Thomas R. Fraser, ...... 556 
On the Annual Range of Temperature over the Globe. By Mr Keith 
Johnston, jun. Communicated by Mr Buchan, Secretary of the 
Scottish Meteorological Society {with a Plate), . . .561 
Note on Electrolytic Polarisation. By Professor Tait, . .579 
On the Causes of Volcanic Action. By Joseph John Murphy, Esq. 
Communicated by Dr Wyville Thomson, .... 583 
Preliminary Note on the Antagonism between the Actions of Physo- 
stigma (Calabar Bean) and Belladonna. By Dr Thomas R. Fraser, 587 
On the Thermal Energy of Molecular Vortices. By. W. J. Macquorn 
Rankine, C.E., LL.D., F.R.SS. Lond. and Edin., . . . 590 
On the Rotation of a Rigid Body round a Fixed Point. Part II. By 
Professor Tait, ....... 592 
Donations to the Library, ...... 592 
