CONTENTS. 
V 
On the Agrarian Law of Lycurgus, and one of Mr Grote’s Canons 
of Historical Criticism. By Professor Elackie, 
On the Occurrence of Amoehiform Protoplasm and the Emission of 
Pseudopodia in the Hydroida. By Professor Allman, . 
Description of the Lithoscope, an instrument for distinguishing 
Precious Stones and other Bodies. By Sir David Brewster, K.H., 
On the Temperature of certain Hot Springs in the Pyrenees. By 
B. E. Scoresby- Jackson, M.D., F.R.C.P., 
On Human Crania allied in Anatomical Characters to the Engis 
and Neanderthal Skulls. By Wm. Turner, M.B., Senior Demon- 
strator of Anatomy in the University of Edinburgh, 
Notice of a Simple Method of Approximating to the Roots of any 
Algebraic Equation. By Edward Sang, Esq., . 
Notice of the State of the Open-Air Vegetation in the Edinburgh 
Botanic Garden during December 1863. By J. H. Balfour, 
A.M., M.D., F.R S., F.L.S., ..... 
On the Influence of the Refracting Force of Calcareous Spar on 
the Polarisation, the Intensity, and the Colour of the Light which 
it Reflects. By Sir David Brewster, K.H., F.R.S., 
On the Most Volatile Constituents of American Petroleum. By 
Edmund Ronalds, Ph.D., ..... 
On the Action of Terchloride of Phosphorus on Aniline. By 
Magnus M. Tait, F.C.S., ..... 
On Fermat’s Theorem. By Professor Tait, 
Notice of a curious Binocular Telescope. By Professor Archer, 
On the Gods of the Rigveda. By John Muir, D.C.L., LL.D., 
On the Diffraction Bands produced by Double Striated Surfaces. 
By Sir David Brewster, K.H., F.R.S., 
An Essay on the Theory of Commensurables. By Edward Sang, Esq., 
On Superposition, No. 11. By Professor Kelland, 
On Centrobaric Bodies. By Professor W. Thomson, 
On the Anatomy and Physiology of the Mitral, Tricuspid, and 
Semilunar Valves in Mammals, Birds, Reptiles, and Fishes. By 
James B. Pettigrew, M.D., Edinburgh, Assistant in the Museum 
of the Royal College of Surgeons of England. Communicated by 
Wm. Turner, M.B., ...... 
On some points in the Metrology of the Great Pyramid. By Pro- 
fessor C. Piazzi Smyth, Astronomer- Royal for Scotland, 
The Decimal Problem Solved. By James Alexander, Esq. Com- 
municated by E. Sang, Esq., . 
On the Elevation of the Earth’s Surface Temperature produced 
by Underground Heat. By Professor W. Thomson, F.R.S., 
F.R.S.E., ....... 
On the Celtic Languages in their Relation to each other, and to the 
Teutonic Dialects. By W. F. Skene, Esq., 
On the Protection of Vegetation from Destructive Cold every night. 
By Professor W. Thomson, ..... 
On Vital Agency, with reference to the Correlation of Forces. By 
William Seller, M.D., F.R.S.E., Fellow of the Royal College of 
Physicians of Edinburgh, ..... 
158 
158 
160 
160 
161 
162 
166 
175 
176 
177 
181 
181 
183 
184 
184 
190 
190 
193 
198 
199 
200 
202 
203 
209 
