BOWMAN.—The Structure of the Wool Fibre in its Relation to the Use of Wool for Technical Purposes:

Being the substance, with additions, of Five Lectures, delivered at the request of the Council, to the members of the Bradford Technical College, and the Society of Dyers and Colorists. By F.H. Bowman, D. Sc., F.R.S.E., F.L.S. Illustrated by 32 engravings. 8vo. $6.50

BYRN.—The Complete Practical Distiller:

Comprising the most perfect and exact Theoretical and Practical Description of the Art of Distillation and Rectification; including all of the most recent improvements in distilling apparatus; instructions for preparing spirits from the numerous vegetables, fruits, etc; directions for the distillation and preparation of all kinds of brandies and other spirits, spirituous and other compounds, etc. By M. La Fayette Byrn, M.D. Eighth Edition. To which are added Practical Directions for Distilling, from the French of Th. Fling, Brewer and Distiller. 12mo.

BYRNE.—Hand-Book for the Artisan, Mechanic, and Engineer:

Comprising the Grinding and Sharpening of Cutting Tools, Abrasive Processes, Lapidary Work, Gem and Glass Engraving, Varnishing and Lackering, Apparatus, Materials and Processes for Grinding and

Polishing, etc. By Oliver Byrne. Illustrated by 185 wood engravings. 8vo. $5.00

BYRNE.—Pocket-Book for Railroad and Civil Engineers:

Containing New, Exact and Concise Methods for Laying out Railroad Curves, Switches, Frog Angles and Crossings; the Staking out of work; Levelling; the Calculation of Cuttings; Embankments; Earthwork, etc. By Oliver Byrne. 18mo., full bound, pocket-book form. $1.75

BYRNE.—The Practical Metal-Worker's Assistant: