The Geological SMagazine Advertiser. 
A Course of Six Elementary Lectures on Geology and Paleontology 
will be given by J. TENNANT, F.G.S., Professor of Geological Mineralogy at King’s 
College, London, Mineralogist to Her Majesty and to the Baroness Burdett-Coutts, on 
JULY Sth, 6th, 7th, 8th, 9th, and 10th, at 10 a.m. 
DerscriptivE GEoLogy.—Classification of Rocks into Aqueous, Voleanic, Plutonic and 
Metamorphie. ; 
Mineral Composition of Strata.—Arenaceous, Argillaceous, Caleareous.—Chronological 
Classification of Sedimentary Rocks, with descriptions of the principal Fossils belonging 
to each’great deposit. 
TERTIARY, or Carnozoic SERtES.—Cave-Deposits, Crag, Isle of Wight, and Bagshot 
series, London Clay, Woolwich beds. 
SEconDaARY, or Mrsozoic SERIES.—Cretaceous, Wealden, Oolitic (Upper, Middle, and 
Lower), Triassic groups. 
Primary, or PaLmozorc SERIES.— Permian, Carboniferous, Devonian, Silurian. 
and Cambrian groups. 
The mode of Collecting, Cleaning, and Arranging Fossils, Minerals, and Rock- 
specimens will be described. 
A Course of Six Elementary Lectures on Mineralogy, 
So Apaprep as To Factuitate THE Stupy or GroLoGy AND oF THE MINERAL 
SUBSTANCES USED IN THE ARTS. 
on JULY 12th, 13th, 14th, 15th, 16th, and 17th, 
The Course will commence with a description of the Physical and Chemical Characters of 
Minerals in general. 
Puysicat Cuaractrrs.—Crystallization, Cleavage, Fracture, Frangibility, Hardness, Lustre, 
Colour, Flexibility, Double Refraction, Touch, Taste, Odour, Streak, Powder, Adhesion to 
the Tongue, Magnetic and Electric Properties, Phosphorescence, Specific Gravity. 
CarmicaL Cuaracrers.—Use of the Blowpipe, Action of Acids, &c. 
The principal simple Mirerals will be next separately considered, and the readiest mode of 
distinguishing them described. The following is the order adopted :— 
A. Earthy Minerals. — Rock-Crystal, Amethyst, Cairngorm, Avanturine, Cat’s-eye, Opal, 
Chaleedony, Flint, Onyx, Agate, Carnelian, Heliotrope, Jasper, Hornstone, Chert, Garnet, 
Idocrase, Axinite, Epidote, Augite, Hornblende, Asbestos, Tremolite, Actinolite, Felspars, 
Zeolites, Mica, Talc, Chlorite, Calcite, Fluor, Selenite, Baryta, Strontia, Salt, Cryolite, &c. 
B. Combustible Minerais.—Sulphur, Bitumen, Coal, Jet, Amber, &c. 
C. Vinerals used in Jewelry.—Diamond; coloured varieties of Corundum—Sapphire, Ruby, 
Topaz—called Oriental Stones; Spinel, Turquoise, Topaz, Emerald, Beryl, Hyacinth, Tour- 
maline, Lapis-lazuli, &c. 
D. The Metalliferous Minerals will be fully described in the Practical Course. 
The Course of Instruction includes a minute description of all the substances entering into 
the composition of Rocks, and of those Minerals which are also used in the Arts, illustrated 
by an extensive collection of characteristic specimens and diagrams of the principal crystal- 
line forms, &c. 
A more extended Course of the above Lectures is given at King’s College, commencing in 
October and ending at Christmas. 
To be followed by Six Elementary Lectures on Rocks and Metallic 
Minerals, 
on JULY 19th, 20th, 21st, 22nd, 28rd, and 24th. 
The Lectures delivered on the subject of Geological Mineralogy are intended to have especial 
reference to the important practical applications of that science to Engineering, Mining, 
Architecture, and Agriculture. The Granites, Syenites, Porphyries, Greenstones, Clays, &c., 
will be described, and the Minerals peculiar to each noticed. 
The application of Geology to pursuits connected with mining-operations for Coal, Tron, 
Copper, Tin, Silver, Gold, Mercury, Antimony, Zinc, Cobalt, &c., will be specially considered. 
The student is directed how to proceed in the examination of a new country, how to collect 
and record his observations, and to mark his specimens, in order to render them useful to 
more experienced geologists at home. 
In order more fully to exemplify the applications of the Science, Mr. Tennant accompanies 
his Classes to various Museums in London, including !the Museum of Practical Geology and 
the British Museum; also on excursions into the country, in which the actual field-work of 
the Geologist is explained and illustrated. 
The above Lectures in a more extended form are given at King’s College, commencing in 
January and ending at Easter. 
Terms 10s. 6d. for each Course, or One Guinea for the three Courses. 
PRIVATE INSTRUCTION on the above subjects is also given at 149,Srranp, W.C. 
by Prof. TENNANT. ‘Terms, 7s. for lesson of one hour, 
July, 1880. 
