CONTENTS. 
Vll 
On the Physiological Action of the Salts of the Ammonium Bases 
derived from Atropia and Conia. By Dr A. Crum Brown and Dr 
Thomas R. Fraser, . . . . . . .461 
Note on the Determination of Heights, chiefly in the Interior of Con- 
tinents, from Observations of Atmospheric Pressure. By Alexander 
Buchan, M.A., Secretary of the Scottish Meteorological Society, . 465 
Notice of a Remarkable Mirage observed in the Firth of Forth. By 
Professor Christison, . . . . . .472 
Minute of Council on the Death of Principal Forbes, . . . 476 
Practical Note on Intensified Gravity in Centrifugal Governors. By 
Professor C. Piazzi Smyth, . . . . . .477 
Mr Mill’s Theory of Geometrical Reasoning Mathematically tested. 
By W. R. Smith, Esq., Assistant to the Professor of Natural Philo- 
sophy. Communicated by Professor Tait, . . . .477 
Note on Captain A. Moncrieffs System of working Artillery. By R. 
W. Thomson, Esq., C.E., ...... 485 
Note on an undescribed variety of Flexible Sandstone. By T. C. 
Archer, Esq., ....... 485 
Address on the Progress of the Geological Survey of Scotland. By 
Archd. Geikie, Esq., ...... 487 
On Traces in the Adult Heart of its Transitions in form during Foetal 
Life. By P. D. Handyside, M.D., (with a Plate), . . . 499 
An Account of the Anthropoid Apes, chiefly with reference to Speci- 
mens recently acquired by the Edinburgh Museum of Science and 
Art. By Professor Allman, . . . . .501 
Motion of a Palladium Plate during the formation of Graham’s Hydro- 
genium. By James Dewar, Esq., ..... 504 
Some Observations on Free, An-atomic, or Transmissible Power. By 
R. S. Wyld, Esq., ....... 512 
On the Practical Application of Reciprocal Figures to the Calculation 
of Strains on Framework. By Professor Fleeming Jenkin, . 516 
On a New Synthesis of Ammonia. By A. R. Catton, Esq., late Fellow, 
and P. T. Main, Esq., Fellow of St John’s College, Cambridge, . 516 
On the Present State of the Sun’s Distance Question — continued. By 
W. Petrie, Esq. Communicated by Professor C. Piazzi Smyth, . 517 
On Chemical Structure. By Dr A. Crum Brown, . . . .518 
Observations on the Temperature of Newly-born Children. By T. J. 
Maclagan, M.D., Dundee. Communicated by J. Matthews Duncan, 519 
On the Growth, Development, and Situation of the Human Foetal 
Heart. By Professor Macdonald, . . . . .519 
The Mean Pressure of the Atmosphere, and the Prevailing Winds for 
the Months and for the Year. Part II. By Alexander Buchan, 
M.A., Secretary of the Meteorological Society, . . . 523 
On the Rectangular Current Theory of Storms, illustrated by two 
Storms which passed over the United States, from the 13th to 19th 
March 1869. By Robert Russell, Esq., .... 525 
On the Boulder-Clay of Europe. By D. Milne-Home, Esq., . . 529 
