PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
vol. viii. 1874-75. No. 92. 
Ninety-Second Session. 
Monday , 3 d May 1875. 
DAVID MILNE HOME, Esq., Vice-President, in the 
Chair. 
The Portrait of Sir Robert Christison, Bart., Honorary 
Vice-President of the Society, executed by George Reid, 
Esq., Aberdeen, was uncovered. 
The following Communications were read 
1. Laboratory Note. — Analysis of Titaniferous Iron Sand 
from North Berwick. By James Davidson, Esq. Com- 
municated by Professor Crum Brown. 
In an excursion of Professor Geikie’s class to North Berwick 
(5th February), a layer of titaniferous iron sand was found lying 
along the shore for a short distance. 
The rocks at this locality consist chiefly of dull green and red 
trap-tuffs, traversed by dykes and veins of basalt. Immediately in 
front of the spot where the iron sand was met with several intrusive 
masses of dark heavy basalt occur. It was evidently from the 
decomposition and trituration of this rock that the iron sand came, 
which has been assorted by the waves along the upper margin of 
the beach. 
3 Y 
VOL. VIII. 
