IV 
On some Abnormal Cones of Pinus Pinaster. By Professor 
Alexander Dickson, . 
Monday , 1 5th May 1871. 
Address on Spectrum Analysis. By Professor Tait, 
Note on the Early History of Spectrum Analysis. By IP. 
Fox Talbot, Hon. E.R.S.E., . 
On some Optical Experiments. By H. F. Talbot, Hon. 
F.R.S.E.— 
1. On a New Mode of observing certain Spectra, 
2. On the Nicol Prism, . 
Note on a New Scottish Acidulous Chalybeate Mineral 
Water. By James Dewar, F.B.S.E., . 
Monday , 29 th May 1871. 
On the Homologies of the Vertebral Skeleton in the Osseous 
Fishes and in Man. By Professor Macdonald, 
Scheme for the Conservation of Remarkable Boulders in 
Scotland, and for the Indication of their Positions on 
Maps. By D. Milne Home, Esq., 
Note of a New Form of Armature and Break for a Magneto- 
Electric Machine. By R. M. Ferguson, Ph.D., 
Mathematical Notes. By Professor Tait — 
1. On a Property of Self-Conjugate Linear and 
Vector Functions,., .... 
2. Relation between corresponding Ordinates of two 
Parabolas, ..... 
3. On some Quaternion Transformations, 
4. On an Expression for the Potential of a Surface- 
distribution, &c., .... 
An Experimental Research on the Antagonism between the 
Actions of Physostigma and Atropia. By Dr Thomas 
R. Fraser. (With a Diagram), 
On the Homological Relations of the Coelenterata. By 
Professor Allman, F.R.S.E., .... 
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Donations to the Society, 
*/ i 
514 
