. Ass't S. Mathematical Professor at the
Royal Naval College, Portsmouth, and THOMAS BROWN, Assoc. Inst.
C.E., Chief Engineer R.N. Attached to the Royal Naval College. With
numerous illustrations. 8vo. $5.00

$MARTIN.--Screw-Cutting Tables, for the Use of Mechanical
Engineers$:

Showing the Proper Arrangement of Wheels for Cutting the Threads of
Screws of any Required Pitch; with a Table for Making the Universal
Gas-Pipe Thread and Taps. By W.A. MARTIN, Engineer. 8vo. .50

$MICHELL.--Mine Drainage$:

Being a Complete and Practical Treatise on Direct-Acting
Underground Steam Pumping Machinery. With a Description of a large
number of the best known Engines, their General Utility and the
Special Sphere of their Action, the Mode of their Application, and
their Merits compared with other Pumping Machinery. By STEPHEN
MICHELL. Illustrated by 137 engravings. 8vo., 277 pages. $6.00

$MOLESWORTH.--Pocket-Book of Useful Formulae and Memoranda for Civil
and Mechanical Engineers.$

By GUILFORD L. MOLESWORTH, Member of the Institution of Civil
Engineers, Chief Resident Engineer of the Ceylon Railway.
Full-bound in Pocket-book form $1.00

$MOORE.--The Universal Assistant and the Complete Mechanic$:

Containing over one million Industrial Facts, Calculations,
Receipts, Processes, Trades Secrets, Rules, Business Forms, Legal
Items, Etc., in every occupation, from the Household to the
Manufactory. By R. MOORE. Illustrated by 500 Engravings. 12mo.
$2.50

$MORRIS.--Easy Rules for the Measurement of Earthworks$:

By means of the Prismoidal Formula. Illustrated with Numerous
Wood-Cuts, Problems, and Examples, and concluded by an Extensive
Table for finding the Solidity in cubic yards from Mean Areas. The
whole being adapted for convenient use by Engineers, Surveyors,
Contractors, and others needing Correct Measurements of Earthwork.
By ELWOOD MORRIS, C.E. 8vo. $1.50

$MORTON.--The System of Calculating Diameter, Circumference, Area,
and Squaring the Circle$:

Together with Interest and Miscellaneous Tables, and other
information. By JAMES MORTON. Second Edition, enlarged, with the
Metric System. 12mo. $1.00

$NAPIER.--Manual of Electro-Metallurgy$:

Including the Application of the Art to Manufacturing Processes. By
JAMES NAPIER. Fourth American, from the Fourth London edition,
revised and enlarged. Illustrated by engravings. 8vo. $1.50

$NAPIER.--A System of Chemistry Applied to Dyeing.$

By JAMES NAPIER, F.C.S. A Ne