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Advertisements.

Joys, News,
Dec. 26, 1879.

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MASCHINENBAU-ACTIEN-GESELLSCHAFT
“HUMBOLDT,”
In Kalk bei Kéln a/Rh,
PERFORATORS OF ALL KINDS OF METALS.
Tilustrated Price Licts and Estimates for Special Designs
to be had on pplication from our Sole Agents
MESSRS. B. H. REMMERS .& CO.,
63. West Regent Street, Glasgow.

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Messrs. B. H. REMMERS & CO., GLASGOW.
Manufa@urers of Filter-Presses, Pumps, &c. Filter-Presses in Iron, Bronze, Wood, &c., of the most improved
construction, and of superior workmanship, suitable for all purposes where complete and thorough Filtration and
Lixiviation is required. ]
Pumps in Iron, Bronze, Ebonite, &c., for Steam, Hand, Pulley, Eccentric, or Crank Power.
Estimates on Apblication.

Chemical Apparatus—Scientific Instruments
Pp .
APPARATUS FOR THE ANALYSIS OF WATER ACCORDING TO
PROFESSORS FRANKLAND AND BISCHOF.
CHEMICAL AND PHILOSOPHICAL PURPOSES AND LECTURES.
ELECTRICAL, MEDICAL, AND EXPERIMENTAL COILS AND APPARATUS.
BUNSEN’S MODIFIED FILTER PUMPS, from 10s 8d. to 67s.
GEISSLER'S TUBES. .
Electrical Lamps from 35s. upwards, and Battery of 40 quart Bunsen’s Cells for same at £8.
Catalogues and Hiustrations will be sent gratuitously. 4 Liberal Discount allowed to Wholesale Buyers.
WHOLESALE IMPORTERS ano MANUFACTURERS, ]
AUG. BEL & CO,
Sole Agents for Grenet’s Batteries, and Contractors to the Government.
34, Maiden Lane, Southampton St., Strand, W.C,
CAILLETET’S APPARATUS FOR LIQUEFACTION OF GASES.
Tor the convenience of Teachers and Students at the South Kensington Classes, the Science and Art Department
has authorised us to keep a Stock inthe store-room, first floor of the building, where the different sets and other
articles are always ready for deliverv.
BERNERS COLLEGE of CHEMISTRY.
Instrution and preparation in CHEMISTRY and the EXPERI.
MENTAL SCIENCES under the direction of Professor E. V.
GARDNER, F.A.S., M.S.A.
2 he Class Rooms are open from 11 to 5a.m.and from 7to 10p.m
a .
Bapecial facilities orpersons preparing for Government and other
sxaminations.
Private Pupils will find everyconvenience.
Analyses, Assays, and Practical Investigations conneéted witk
Patents, &c.,#onduéted.
Prospectuses and full particulars on application to Prof Gardner
at Berpers College, 44, Berners-street W. -

MINERALOGY AND GEOLOGY.
NEW LIST of Colle¢tions of Minerals, Fossils, and Rocks, with
prices. New List of Minerals for Chemical Purposes, Manufatures
and Research. New List of Varieties of Rocks New List of Prices
and Sizes of Cabinets for Natural History and other purposes. New
Catalogue of Secondhand and New Books on Geology and Kindred
Sciences. New Supplementary List of Books. New List of Sections
of Rocks and Minerals for the Microscope. New List of Prices and
Patterns for Geological Hammers. New List of Blowpipe Cabinets.
Apparatus, and Materials. Also Implements and Appliances for
practical work in Geology and Mineralogy.
Post free on application to JAMES R. GREGORY, Geologists,
go] F., ineralogists’ Repository, 88, Charlotte Street, Fitzroy Square,
ondon