A Treatise On The Principles And Practice Of Harbour Engineering

«3 OHARLE« GRIFFIN & OO.'S PUBLICATIONS. GRIFFIN’S NAUTICAL SERIES. Second Edition, Revised. With Numerous Illustrations. Price 3s. 6d. Practical Mechanics: Applied to the Requirements of the Sailor. By THOS. MACKENZIE, Master Manner, F.R.A.S. General Contents. —Resolution and Composition of Forces— Work done by Machines and Living Agents—The Mechanical Powers: The Lever; Derricks as Bent Levers—The Wheel and Axle : Windlass ; Ship s Capstan ; Crab Winch-Tackles : the “Old Man ”—The Inclined Plane ; the Screw— The Centre of Gravity of a Ship and Cargo — Relative Strength of Bope : Steel Wire, Manilla, Hemp, Coir—Derricks and Shears—Calculation of the Cross-breaking Strain of Fir Spar—Centre of Effort of Sails Hydrostatics : the Diving-bell ; Stability of Floating Bodies ; the Ship’s Pump, &c. “ This excellent book . . . contains a large amount of information. “ Well worth the money . . . will be found exceedingly helpful. ‘^^o^Ships’ Officers’ bookcase will henceforth be complété without Captain Mackenzie’s ‘Practical Mechanics.’ Notwithstanding my many years’ experience at sea, it has told me how mach more there is to acquire." (Letter to the Publishers from a Master Mariner). “ I must express my thanks to you for the labour and care you have taken in 'Practical Mechanics.’ . . . It is a life’s experience. . . What an amount we frequently see wasted by rigging purchases without reason and accidents to spars, &c., &c. ! ‘Practical Mechanics would save all this.”—(Letter to the Author from another Master Mariner). WORKS BY RICHARD C. BUCK, of the Thames Nautical Training College, H.M.S. ‘ Worcester.' A Manual of Trigonometry : With Diagrams, Examples, and Exercises. Price 3s. 6d. Third Edition, Revised and Corrected. * » Mr. Buck’s Text-Book has been specially pbbpabed with a view to the New Examinations of the Board of Trade, in whioh Trigonometry is an obligatory subject. „ „., “ This bminbstly PRACTICAL and ebliable VOLUME. —Schoolmaster. k Manual of Algebra. Designed M meet the Requirements of Sailors and others. Second Edition, Revised. Price 3s. 6d. * * These elementarv works on algebra and trigonometry are written specially for thoøe*who will have little opportunity of consulting a Teacher. They are hooks for self- Help” All but the simplest explanations have, therefore, been avoided, and answers to th^Exercises are g?ven. 1 Any person may readily, by careful ^udy^ecome master of theP contents, and thus lay the foundation for a further mathematical course, if desired.lt is honed that to the younger Officers of our Mercantile Marine they will be found deoldedly serviceable. The Examples and Exercises are taken from the Examination Papers set for ‘b” “"oiearly a'rranTod?and 'well got up. ... A Arst-rete Elementary Algebra. - Nautical Magatine. *** For complété List of Griffin s Nadtisal Series, see p. 39. LONDON: CHARLES GRIFFIN & CO., LIMITED, EXETER STREET, STRAND.