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ADVERTISEMENTS. 
MR. TENNANT, 
MINERALOGIST BY APPOINTMENT TO HEE MAJESTY, 
149, STRAND, LONDON, W.C., 
Gives practical Instruction in Mineralogy and Geology. He can also supply 
elementary collections of Minerals, Rocks, and Fossils on the following terms : — 
100 Small Specimens, in cabinet with three trays . , . . £2 2 0 
*200 Specimens, larger, in cabinet with five trays .... 550 
300 Specimens, larger, in cabinet with eight drawers ... 10 10 0 
400 Specimens, larger, in cabinet with twelve drawers . . 21 0 0 
More extensive collections, either to illustrate Mineralogy or Geology, at 50 to 
100 Guineas each, with every requisite to assist those commencing the study of 
these interesting branches of science, a, knowledge of which affords so much 
pleasure to the traveller in all parts of the world. 
* A collection for Five''.;Guineas, which will illustrate the recent works on 
Geology by Murohisou, Buckland, Lyell, Mautell, Phillips, Ansted, Page, and 
others, contains 200 specimens, in a mahogany cabinet with five trays, comprising 
the following specimens, viz. : — • 
MINERALS, which are either the components of Rocks, or occasionally im- 
bedded in them : — Quartz, Agate, Chalcedony, Jasper, Garnet, Zeolite, Hornblende, 
Augite, Asbestus, Felspar, Mica, Talc, Tourmaline, Calcareous Spar, Fluor, Sele- 
nite. Baryta, Strontia, Cryolite, Salt, Sulphur, Plumbago, Bitumen, Jet, Amber, &c. 
NATIVE METALS, or METALLIFEROUS MINERALS; these are found 
in masses, in beds, or in veins, and occasionally in the beds of rivers. Specimens 
of the following Metallic Ores are contained in the cabinet : — Iron, Manganese, 
Lead, Tin, Zinc, Copper, Antimony, Silver, Gold, Platina, &c. 
ROCKS : — Granite, Gneiss, Mica-slate, Clay-slate, Porphyiy, Serpentine, Sand- 
stones, Limestones, Basalt, Lavas, &c. 
PALEOZOIC FOSSILS, from the Llaudeilo, Wenlock, Ludlow, Devonian, 
and Carboniferous Rocks. 
SECONDARY FOSSILS, from the Lias, Oolite, AVealden, and Cretaceous Groups. 
TERTIARY FOSSILS, from the Woolwich, Barton, and Bracklesham Beds, 
London Clay, Crag, &c. 
In the more expensive Collections some of the specimens are rare, and all more 
select. 
EXTENSIVE AND VALUABLE COLLECTION OF MINERALS. 
Mr. Tennant bought at the Stowe Sale the Duke of Buckingham's Collection of 
Minerals, which he has greatly enriched by a Collection of Coloured Diamonds, 
Australian Gold, and many other specimens of great value and interest. The 
Collection, consisting of 3,000 specimens, is in two cabinets, each containing thirty 
drawers, with a glass case on the top for lai'ge specimens, and is offered at £2,000. 
Such a Collection is well adapted for any public Institution, or any gentleman 
interested in mining pursuits. 
SIX DIAGRAMS OF THE EXTINCT ANIMALS, by B. W. Hawkins, F.L.S., 
&c., fida ited for Educational Purposes. Size of each diagram, 40 by 29 inches, in 
double-tinted lithography. Price £1 10s. 
All the recent Works relating to Mineralogj^, Geology, Conchology, Chemistry, 
and Botany ; also Geological Maps, Models, Diagrams, Hammers, Blowpipes, Mag 
i\ifyiug Glasses, Platina Spoons, Electrometer and Magnetic Needles, Glass-top 
Boxes, Brass and Steel Forceps, Acid Bottles, Microscopic Objects, &c., can be 
supplied to the Student in these interesting branches of Science, by J. TENNANT, 
MiNjsiiALOGisT BY ArroiNTMENT TO HER MAJESTY, 149, Strand, London, W.C. 
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