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ADVERTISEMENTS. 
MR. T E N N A N T , 
MINERALOGIST BY APPOINTMEMT TO HER MAJESTY, 
149, STRAND, LONDON, W.C., 
Gives practical Instruction iu Mineralogy antl Geology. He cau also supply elementary 
collections of Minerals, Rocks, and Fossils on the following terms : — 
100 Small Specimens, in cabinet with three trays . . .£220 
*200 Specimens, larger, in cabinet with five trays . . . 5 5 0 
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 Murchison, Buokland, Lyell, Mantell, Phillips, Ansted, Page, and others, con- 
tains 200 specimens, in a mahogany cabinet with five trays, comprising the following 
specimens, viz. : — 
MINERALS, which are either the components of Rocks, or occasionally imbedded 
in them : — Quartz, Agate, Chalcedony, Jasper, Garnet, Zeolite, Hornblende, Augite, 
Asbestos, Felspar, Mica, Talc, Tourmaline, Calcareous Spar, Fluor, Selenite, 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, Porphyry, Serpentine, Sand- 
stones, Limestones, Basalt, Lavas, &c. 
PAL^BOZOIC FOSSILS, from the Llandeilo, Wenlock, Ludlow, Devonian, and 
Carboniferous Rocks. 
SECONDARY FOSSILS, from the Lias, Oolite, Wealden, 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. Tehnant bought at the Stowe Sale the Duke of Buckingham's Collection of 
Minerals, which he has greatly enriched by a Collection of Coloured Diamonds, Aus- 
tralian Gold, and many other specimens of great value and interest. The Collection, 
consisting of 3000 specimens, is in two cabinets, each containing thirty drawers, with 
a glass case on the top for large specimens, and is offered at £2000. 
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., adapted for Educational Purposes. Size of each diagram, 40 by 29 inches, in 
double-tinted lithography. Price £1 10s. 
All the recent Works relating to Mineralogy, Geology, Conchology, Chemistxy, and 
Botany ; also Geological Maps, Models, Diagrams, Hammers, Blowpipes, Magnifying 
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, Mineralogist by 
Appointment to Her Majestt, 149, Strand, London, W.C. 
