170 
NON-METALLIC MINERALS. 
805. Flints, dressed for fire¬ 
arms. 
Presented by N. F. Wetherall. 
1. Single-barrel pistol. 
2 and 3. Double-barrel pistol. 
4 and 5 . Small pistol. 
6 and 7. Horse pistol. 
8. Carbine. 
9 and 10. Double-edged, used by the 
Turks. 
806. Flints, showing the action 
of fire. 
JFrom the Tower of London, burnt 
October SOth, 1841. 
807 to 812. Rolled Flints, 
showing the action produced by 
infiltration of Oxide of Iron, 
the coloured bands always being 
in relation to the rolled surface. 
From the neighbourhood of St 
Albans, Herts. 
813. Flint, in which, by recent 
attrition the coloured bands are 
intersected and exhibited super¬ 
ficially. 
From the beach at Aldborough, 
Suffolk. 
814 and 815. Conglomerate, 
formed of fiint pebbles embedded 
in a siliceous base. 
From the beach at Aldborough. 
816. Conglomerate, or “Pud¬ 
ding-stone,” polished section. 
817. Chalk Flint, broken open 
to show the Chalcedony lining its 
hollow interior. 
818 to 826. SiLiciFiED Spon¬ 
ges, Choanites and Ventriculites 
{Amorphozoa) ; from the Chalk. 
Presented by J. G. Francis. 
827 to 829. SiLiciFiED Corals 
i^Astrced). 
Antigua, W. Indies. 
830 to 835. SiLiciFiED Wood. 
Antigua. 
(Nos. 834 and 835 placed in the case 
beneath.) 
836. SiLiciFiED Wood. 
W. Indies. 
Presented by Mrs. Pett. 
837. Silicihed Wood. 
^Tasmania. 
838. SiLiciFiED Wood. 
Beechy Island, Arctic Regions. 
Presented by Dr. Me William. 
839 and 840. Fossil AYood, 
transverse and longitudinal sec¬ 
tions. 
From the Oxford Clay, Chippen¬ 
ham, Wilts. 
(Placed in the case beneath.) 
A collection of specimens of Silicified 
Wood, from Antigua, presented by the 
Countess Grey, will be found in a sepa¬ 
rate case on this floor. 
841. Wood Opal, portion of an 
opalized tree-stem, from the pumi- 
ceous conglomerates. 
Near Antal, Schemnitz, Hungary. 
842. Common Opal. 
Hungary. 
j 843. Noble or Precious Opal, 
embedded in porphyry. 
Czerwenitza, Hungary. 
844. Precious Opal, in por¬ 
phyry. 
I Czerwenitza. 
j Presented by J. C. La Trobe. 
i 845 and 846. Precious Opal. 
I / 
I embedded in matrix. 
, Hungary. 
I 847. Precious Opal, in ma¬ 
trix. 
Guatemala, Central America., 
848 and 849. Precious Opals, 
cut. 
Hungary. 
850. Pink Opal, with Quincite, 
a hydrous silicate of magnesia and 
iron. 
Mehun, Dept, du Cher, France. 
851. Alumocalcite, an impure 
variety of Opal. 
Eibenstock, Saxony. 
852. Menilite, or Liver Opal. 
Menil-montant, near Paris. 
853. Hyalite, or Mliller’s Glass. 
Budingen, near Hanau, Hessen. 
854. Hyalite, on greenstone 
porphyry. 
Schemnitz, Hungary. 
