=WEIGHT CALCULATOR.= Being a Series of Tables upon a New and Comprehensive Plan, exhibiting at one Reference the Exact Value of any Weight from 1 lb. to 15 tons, at 300 Progressive Rates, from 1d. to 168s. per cwt., and containing 186,000 Direct Answers, which, with their Combinations, consisting of a single addition (mostly to be performed at sight), will afford an aggregate of 10,266,000 Answers; the whole being calculated and designed to ensure correctness and promote despatch.  By HENRY HARBEN, Accountant.  Sixth edition, carefully corrected.  Royal 8vo, strongly half bound =L1 5s.=

     “A practical and useful work of reference for men of business
     generally.”—­Ironmonger.

     “Of priceless value to business men.”—­Sheffield Independent.

=WOOD ENGRAVING.= A Practical and Easy Introduction to the Study of the Art.  By W. N. BROWN.  Crown 8vo, cloth. =1/6=

HANDYBOOKS FOR HANDICRAFTS.

BY PAUL N. HASLUCK.

Author of “Lathe Work,” etc.  Crown 8vo, 144 pp., price 1s. each.

[symbol:  right pointing hand]_These_ HANDYBOOKS have been written to supply information for WORKMEN STUDENTS, and AMATEURS in the several Handicrafts, on the actual PRACTICE of the WORKSHOP, and are intended to convey in plain language TECHNICAL KNOWLEDGE of the several CRAFTS. In describing the processes employed, and the manipulation of material, workshop terms are used; workshop practice is fully explained; and the text is freely illustrated with drawings of modern tools, appliances, and processes.

=METAL TURNER’S HANDYBOOK.= A Practical Manual for Workers at the Foot-Lathe.  With 100 Illustrations =1/0=

     “The book displays thorough knowledge of the subject.”—­Scotsman.

=WOOD TURNER’S HANDYBOOK.= A Practical Manual for Workers at the Lathe.  With 100 Illustrations =1/0=

     “We recommend the book to young turners and amateurs.”—­Mechanical
     World.

=WATCH JOBBER’S HANDYBOOK.= A Practical Manual of Cleaning, Repairing, and Adjusting.  With 100 Illustrations =1/0=

     “All connected with the trade should acquire and study this
     work.”—­Clerkenwell Chronicle.

=PATTERN MAKER’S HANDYBOOK.= A Practical Manual on the Construction of Patterns.  With 100 Illustrations =1/0=

     “A most valuable, if not indispensable, manual for the
     pattern-maker.”—­Knowledge.

=MECHANIC’S WORKSHOP HANDYBOOK.= A Practical Manual on Mechanical Manipulation, embracing Information on various Handicraft Processes.  With Useful Notes and Miscellaneous Memoranda.  Comprising about 200 Subjects =1/0=

     “Should be found in every workshop, and in all technical
     Schools.”—­Saturday Review.

=MODEL ENGINEER’S HANDYBOOK.= A Practical Manual on the Construction of Model Steam Engines.  With upwards of 100 Illustrations =1/0=