BILGRAM. - Slide-Valve Gears:

A new, graphical method for Analyzing the Action of Slide-Valves, moved by Eccentrics, Link Motions, and Cut-off Gears, offering easy means for properly designing Valves and Valve-Gears, and for establishing the comparative merits of their various constructions. By Hugo Bilgram, M.E. Illustrated. 16mo. $1.00

CREW. - A Practical Treatise on Petroleum:

Comprising its Geographical Distribution, its Geology, Chemistry, Mining, Refining, Preparation, and Uses. Together with a Description of Gas Wells and the Application of Gas as Fuel, etc. By Benjamin J. Crew. Illustrated. 8vo. (In preparation.)

CROOKES. - Select Methods in Chemical Analysis (Chiefly Inorganic):

By William Crookes, F.R.S., V.P.C.S. 2d edition, re-written and greatly enlarged. Illustrated by 37 wood-cuts. 725 pp. 8vo. $9.50

DAVIS. - A Treatise on Steam-Boiler Incrustation and Methods for Preventing Corrosion and the Formation of Scale:

By Charles T. Davis. Illustrated by 65 engravings. 8vo. $2.00

DAVIS. - The Manufacture of Paper:

Being a Description of the various Processes for the Fabrication, Coloring and Finishing of every kind of Paper, Including the Different Raw Materials and the Methods for Determining their Values, the Tools, Machines and Practical Details connected with an intelligent and a profitable prosecution of the art, with special reference to the best American Practice. To which are added a History of Paper, complete Lists of Paper-Making Materials, List of American Machines, Tools and Processes used in treating the Raw Materials, and in Making, Coloring and Finishing Paper. By Charles T. Davis. Illustrated by 156 engravings. 500 pages, 8vo. $6.00

Hand-Book of Useful Tables for the Lumberman, Farmer and Mechanic:

Containing Accurate Tables of Logs Reduced to Inch Board Measure, Plank, Scantling and Timber Measure; Wages and Rent, by Week or Month; Capacity of Granaries, Bins and Cisterns; Land Measure, Interest Tables, with Directions for Finding the Interest on any sum at 4, 5, 6, 7 and 8 per cent., and many other Useful Tables. 32 mo., boards. 186 pages .25

MAKINS. - A Manual of Metallurgy:

By George Hogarth Makins, M.R.C.S.S.C.S. Illustrated by 100 engravings. Second edition rewritten and much enlarged. 8vo., 592 pages. $3.00

ROPER. - Instructions and Suggestions for Engineers and Firemen:

By Stephen Roper, Engineer $2.00

ROPER. - The Steam Boiler: Its Care and Management:

By Stephen Roper, Engineer. 12mo., tuck, gilt edges. $2.00

ROPER. - The Young Engineer's Own Book:

Containing an Explanation of the Principle and Theories on which the Steam Engine as a Prime Mover is Based. By Stephen Roper, Engineer. 160 illustrations, 363 pages. 18mo., tuck $3.00

ROSE. - Modern Steam-Engines:

An Elementary Treatise upon the Steam-Engine, written in Plain language; for Use in the Workshop as well as in the Drawing Office. Giving Full Explanations of the Construction of Modern Steam-Engines: Including Diagrams showing their Actual operation. Together with Complete but Simple Explanations of the operations of Various Kinds of Valves, Valve Motions, and Link Motions, etc., thereby Enabling the Ordinary Engineer to Clearly Understand the Principles Involved in their Construction and Use, and to Plot out their Movements upon the Drawing Board. By Joshua Rose, M.E., Author of "The Complete Practical Machinist," "The Pattern Maker's Assistant," "The Slide Valve" and "Mechanical Drawing Self-Taught." Illustrated by over 400 engravings. In one volume, 4to, 320 pages. $6.00

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Several Thousand Receipts, covering the Latest, Most Important and Most Useful Discoveries in Chemical Technology, and their Practical Application in the Arts and the Industries.

Edited chiefly from the German of Drs. Winckler, Eisner, Heintze, Mierzinski, Jacobsen, Koller, and Heinzerling,

WITH ADDITIONS BY
WILLIAM T. BRANNT,
Graduate of the Royal Agricultural College of Eldena, Prussia,
and
WILLIAM H. WAHL, PH. D. (Heid.),
Secretary of the Franklin Institute, Philadelphia; author of "Galvanoplastic Manipulations."

Illustrated by Seventy-eight Engravings.

In one volume, xxxii, 495 pages, 12mo., closely printed, containing an immense amount and a great variety of matter. Price $2.00, free of postage to any address in the world.

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