378 Reports and Proceedings —Mineralogical Society. 
seemed to pass below the workings; in those at a greater distance, it 
seemed as a rule to pass overhead or to travel along the workings. 
There is some, though not decisive, evidence for supposing that the 
fault was felt more severely in the lower than in the upper workings. 
of a pit. 
The originating fault in the neighbourhood of Swansea must run 
from E. 5° N. to W. 5° S., hading to the south, and passing not far 
from the line joining Llanelly to Neath, which is 5 or 6 miles to the 
north of the great east-and-west fault under Swansea Bay. The first 
movement occurred in the eastern focus near Llwynypia, and this was. 
followed after a few seconds by a much stronger movement in the 
western or Swansea focus. ‘he interval between the parts was such 
that the earlier impulse was felt first all over its disturbed area; but, 
as the foci were quite detached, the earthquake was no doubt a true 
twin earthquake. 
6. ‘‘The Ochil Earthquakes of September, 1900, to April, 1907.” 
By Charles Davison, Sc.D., F.G.S. 
During this interval a series of slight shocks was felt chiefly in the: 
villages of Blairlogie, Menstrie, Alva, and Tillicoultry, lyimg between 
the Ochil Hills and the river Forth. There were four shocks in 1900, 
one in 1903, ten in 1905, nineteen in 1906, and eight up to the 
end of April, 1907. The strongest shock of the series occurred on 
September 21st, 1905 ; its intensity was 6, and it disturbed an area of 
about 1,000 square miles. The originating fault must be directed 
from about E. 27° N. and W. 27° S., hading to the north, and passing 
not far from the villages mentioned above. It cannot, therefore, be 
identified with the great Ochil Fault, which in the district referred to 
runs from about KE. 13° N. to W. 18° 8. and near Dollar hades to the 
south; although it is possible that some or many of the shghter shocks 
may have been due to slips along this fault. 
It was announced that ‘‘ The History of the Geological Society of 
London,” by Horace B. Woodward, F.R.S., illustrated with twenty- 
eight portraits and reproductions of medals, will shortly be obtainable 
at the Society’s Apartments, price 7s. 6d. nett; and at the reduced 
price of 6s. by Fellows only. 
The next Ordinary Evening Meeting of the Society will be held on 
Wednesday, November 6th, 1907. 
IIT].—Miveratoeican Socrery. 
Tuesday, June 11th.—Professor H. A. Miers, F.R.S., President, in 
the Chair. 
Hamlinite from the Binnenthal, by Mr. H. L. Bowman. A mineral 
occurring in small brown six-sided plates in the white dolomite, to which 
the name bowmanite was given by Mr. Solly in 1904, is shown by 
analysis to be identical with hamlinite. The crystals show a division 
into six biaxial sectors, and are consequently pseudohexagonal.— 
Faceted Beads of Zinc, by Mr. T. V. Barker. The President described 
beads of zine deposited on crucible lids by sublimation of zine through 
oxide of tin. Some of these beads are covered with brilliant facets. 
