HYDEOCARBONS. 
143 
90. Kimeridge Coal Money, 
circular discs of bituminous shale 
(Kimeridge Coal), apparently 
turned in a lathe, and frequently 
found buried in barrows, &c., in 
the 
Isle of Purheck, Dorsetshire. 
I'resented by Mr. Groves. 
91. Bituminous Substance, 
containing 62 per cent, of volatile 
products. 
Occurring in beds 6 feet thick close 
to the surface, about 50 miles 
-S'. PF. of Bahia, near the right 
bank of the Acarahy Biver, and 
20 miles from its mouth. 
92. Combustible Substance. 
From a stratum of unknown thick¬ 
ness, but known to extend for 
miles on the banks of the Mersey, 
North side of Tasmania. 
Presented by Sir W. Denison. 
93. Straw, carbonized in a 
coking-oven. 
94. Pieces of Plaited Straav, 
Cane, &c., carbonized in a coking- 
oven. 
Presented by J. .Jameson. 
95. Filamentous Carbon 
formed in coking coal in a coking- 
oven. 
96 to 99. Specimens of Coke, 
exhibiting peculiar structures. 
100. Coke, iridescent. 
101. Coke from gas retorts. 
Gas Works, Leith. 
102. Coke from gas retorts, a 
good conductor of electricity. 
103. Coke, from gas retorts, 
same as No. 102, cut and polished 
to show its compact structure, and 
deposition in regular layers. 
Nos. 100 to 103 presented by Dr. J. 
Percy, P.R.S. 
104. Carbon Cylinder, made 
from gas coke, and employed as 
the negative or conducting plate 
in Bunsen’s battery. 
105. Carbon Points, made 
from gas coke, and employed as 
the electrodes of the voltaic bat¬ 
tery in producing the “ electric 
light.” 
106. Hatchettine, or Mineral 
Tallow, in the cracks of part of a 
nodule of clay iron ore. 
Merthyr Tydfil, Glamorganshire. 
Presented by Mr. Conybeare. 
107 to 109. Ozokerite, or Mi¬ 
neral Wax. 
Moldavia. 
Employed by the peasants for greasing 
cart-axles, for candles, &c. 
(The large specimen. No. 109, is placed 
in the case below.) 
110. Bitumen. 
Binnie Quarry, Linlithgowshire. 
Presented by the late Dr. George Wil¬ 
son. 
111. Ozokerite, black, a 
variety closely resembling Bitu¬ 
men. 
Occuring in the sandstone of the 
coal measures, near Edinburgh. 
112. Sandstone, in which the 
Ozokerite (No. Ill) is found. 
113. Candle, made from the 
Ozokerite, and used in the collieries 
where it occurs. 
Nos. Ill to 113 presented by J. II. 
Vivian, M.P. 
114. Bitumen, or Mineral Pitch, 
on grit. 
Prestongrange Colliery, Tranent,. 
Haddingtonshire. 
115. Bottle of Liquid Bitumen. 
Found in a cross cut in the Pres¬ 
tongrange Colliery, Tranent. 
Nos. 114 and 115 presented by Sir G. 
Grant Suttie, Bart. 
116. Asphalt, or compact 
Bitumen. 
From the Great Pitch Lake, Tri¬ 
nidad. 
117. Wire for electric telegraph 
purposes, coated by a patent pro¬ 
cess with asphalt. 
From the Great Pitch Lake, Tri¬ 
nidad. 
Nos. 116 and 117 presented by the 
late Earl of Dundonald. 
118. Asphalt, with Calcite. 
Castle ton, Derbyshire. 
