20 
Records of the Geological Survey of India. 
[vol. VIII. 
Remark's .—The edges have resisted fusion, which is a good quality, and its 
tenderness was not of an appreciable amount. It contracted, however, more 
than I expected. The following were the measurements and weights :— 
Measurement before insertion 
„ after extraction 
Weight before insertion 
„ after extraction 
... 277 tolas. 
... 275| „ 
This brick when externally examined appears to approach in texture much nearer 
the required standard than any other. 
(B).— Was heated like the last in a plumbago crucible. It is made of pure fire-clay. 
Remarks .—I think it was too strongly burnt in the first instance, i. e., before it 
passed into my hands. It cracked on being taken out of the furnace and de¬ 
posited on a cold floor. 
(F).—Was tested in the same manner as (B) and (C). 
Remarks .—Like the other bricks, it exhibits fissures internally. 
(G. & II).—Glenboig bricks, purposely broken, submitted to conditions similar to (B) 
and (C) and (F). 
Remarks .—It will be observed that there are no fissures. No contraction and 
no softening. 
In the second series of trials conducted by Mr. Medlicott, ten bricks, made at the 
Raniganj works, were tested with one of Stourbridge brick and one of Glenboig brick, 
and also one common machine-made brick. They were kept for four hours in the gas 
furnace in plumbago crucibles—for the last two hours at the full blast. None showed any 
sign of fusion. The machine-made brick and the Stourbridge brick were badly cracked, 
and one of the Raniganj bricks slightly so. The loss of weight was very marked in the 
Glenboig brick ; next so in the Stourbridge, probably due to the coarser texture of the former, 
and in both to their having been less well dried than the others. 
Five of the bricks were put into a coke furnace with a Glenboig brick, and five in a 
second furnace with a Stourbridge brick. The former furnace seems to have been most 
heated: even the Glenboig brick bent and broke, and showed as much vitrification as the 
others. In the other furnace, all were more or less damaged—the Stourbridge least so. 
Geological Museum, ^ 
January 1875. J 
LIST OF DONATIONS TO THE MUSEUM. 
During October, November, and December 1874. 
Specimen of Asbestos from Kuran, Kobat Frontier. Presented by Captain N. Cavagnaei. 
An Elephant’s tusk, deeply eaten into by Porcupines, found in the Meekir Hill Jungles. 
Presented by Captain J. Johnstone, s. c. 
Specimens of Opal in matrix from New South Wales. Presented by W. Drummond, Esq., 
Sydney. 
Ores of Copper, Lead, and Antimony, and other minerals from the mines, Kulu, Punjab. 
Presented by Mb. J. Calvert, Kulu. 
Iron Pyrites from the Bozdar Hills, Trans-Indus. Presented by Captain R. G. Sandeman, 
Deputy Commissioner, Dera Gazi Khan. 
Quasi-Fossils (cellular quartz) in schistose slates from Palnad, Madras. Presented by 
J. Vanstavern, Esq. 
January 1875. 
