CARBON AND HYDRO-CARBONS. 
141 
54. Graphite, cut for manu¬ 
facturing into pencils. 
Borrowdale. 
Presented by Messrs. Brookman and 
Langdon. 
55. Leads for pencils, of Bor- 
rowdale Graphite. 
Presented by Messrs. S. Mordan & Co. 
56 and 56a. Graphite, com¬ 
pressed into blocks. 
57. Compressed Graphite, 
“Brockedon’s patent pure Plum- 
“ bago.” 
Nos. 56 to 57 presented by the late W. 
E. Brockedon, F.R.S. 
58. A series of Specimens illus¬ 
trating the manufacture of a Black 
LEAD Pencil. 
Presented by Messrs. S. Mordan & Co. 
1. Blank, or bottom of Cedar. 
2. Bottom grooved for insertion 
of lead. 
3. Bottom -with slice of lead, 
showing mode of insertion. 
4. Bottom filled with lead ready 
for glueing. 
5. Top, a thin piece of cedar, 
which, with the bottom, com¬ 
pletes the pencil. 
Carbon and I 
64. Anthracite, Glance Coal, 
Stone Coal, or non-bituminous 
Coal. 
From the bed named the “ brass 
vein,’' Civm Twrch, Swansea, 
Glamorganshire, S. Wales. 
Presented by the late Sir H. T. Be la 
Beche, C.B. 
65. Anthracite. 
From the Lower Silurian Slates, 
Laxey Mines, I. of Man, 110 
fathoms deep, 1861. 
Presented by W. W. Smyth, F.R.S. 
66. Anthracite, iridescent. 
Eastern Pennsylvania, U.S. 
Presented by C. J. La Trobe. 
67. Mineral Carbon, or 
^ Mother of Coal.” 
6. Pencil ready for turning, 
formed of the top and bottom 
glued together. 
7. Pencil partially turned. 
8 Pencil, turned and finished. 
59. Two Pencils, made from 
the Graphite of the W. Coast of 
Greenland. 
Presented by J. Lundt. 
60. Artificial Graphite, 
with cyano-nitride of Titanium. 
From a mass weighing about iO 
tons, from the hear of a blast 
furnace at Bilston, South Staf- 
fordshire. 
Presented by S. H. Blackwell, F.G.S. 
61. Artificial Graphite, in 
slag, showing that where the slag 
comes in contact with the fuel the 
latter is coked. 
From a blast furnace near Dudley. 
Presented by Dr. John Percy, F.R.S. 
62. Artificial crystalline 
Graphite, or Kish. 
From the Iron blast furnoxes, 
Btissell's Hall, Dudley. 
Presented by S. H. Blackwell, F.G.S. 
63. Artifcial Graphite. 
From the Iron furnaces of Mr. 
Dawes, Bromford, S. Stafford¬ 
shire. 
Presented by J. Dawes, F.G.S. 
: B. 
lDRO-CARBONS. 
68. Peacock Coal, an irides¬ 
cent bituminous Coal, provincially 
called ‘‘ Moontons.” 
Bough Hill End, 3 miles N. of 
Bochdale, Lancashire. 
Presented by E. Tayler. 
69. Coal, exhibiting peculiar 
structure locally called “ crystal¬ 
lized,” or “ cone-in-cone.” 
Merthyr Tydfil. 
This structure is often observable in 
the excellent “ fi’ee-burning ” steam 
coals of South Wales. 
Presented by Mr. Thornburn. 
70. CoNE-iN-CoNE Coal. 
Merthyr Tydfil, Glamorganshire. 
Presented by W. Crawshay. 
