MR. J. TENNANT, GEOLOGIST, 
141), STRAND, LONDON, W.C., 
Gives practical Instruction in Mineralogy and Geology. He can also supply ele- 
mentary collections of Minerals, llocks, 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 .... 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 those 
nteresting branches of science, a knowledge of which affords so much pleasure 
•"o the traveller in all parts of the world. 
* A collection for Five Guineas, which will illustrate the recent works on Geo- 
logy, by Murchison, Buckland, LyeU, ManteU, Philhps, Ansted, Page, and others, 
contains 200 specimens, in a mahogany cabinet with five trays, viz. : — 
MINERALS, which are either the components of Rocks, or occasionally imbed- 
ded in them : — Quartz, Agate, Chalcedony, Jasper, Gamet, ZeoUte, Hornblende, 
Augite, Asbestos, Felspar, Mica, Talc, Tourmaline, Calcareous Spar, Fluor, Selenite, 
Baryta, Strontia, Cryolite, Salt, Sulphur, Plumbago, Bitumen, Jet, Amber, Coal, &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 MetaUic 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, Syenite, Serpentine, 
Sandstones, Limestones, Basalt, Lavas, &c. 
PALEOZOIC FOSSILS, fi-om the Llandeilo, Wenlock, Lndlow, Devonian, and 
Cai'boniferous Rocks. 
SECONDARY FOSSILS, from the Lias, Oohte,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 aU more 
select. 
EXTENSIVE AND VALUABLE COLLECTION OF MINERALS. 
Mr. TENNANT bonght at the Stowe Sale the Duke of Buckingham's Collection 
of Minei als, which he has greatly enriched by a collection of Coloured Diamonds, 
Australian Gold, Malachite, 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 large specimens, and is offered at 
£2,000. 
Such a Collection is well adapted for any public Institution, or any gentleman 
interested in mining pursuits or practical geology, as some of the specimens are 
finer than those in the British Museum. 
Models of Crystals in Glass and Wood to Ulustrate the section on Crystallo- 
graphy and Mineralogy in " Orr's Circle of the Sciences," by the Rev. Walter 
Mitchell, M.A., and Professor Tennant, F.G.S. 
SIX DIAGRAMS OP THE EXTINCT ANIMALS, by B. W. Hawkins, 
F.L.S., F.G.S. , &c., adapted to Educational Purposes. Size of each diagram, 40 
by 29 inches, in double-tinted Uthography. Price £1 10s. 
Catalogue of 2,000 of the most common Fossils found in the British Isles, being 
a hst of those in the Private CoUection of J. TENNANT, F.G.S. Price 2s. 
AU the recent Works relating to Mineralogy, Geology, Conchology, Chemistry, 
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 
suppMed to the Student in these interesting branches of Science, by J. TENNANT, 
Mineralogist by Appoiktment to Her Majesty, 149, Strand, London, W.C. 
