NAUTICAL WORKS. 35 



GRIFFIN'S NAUTICAL SERIES. 



THIRD EDITION, REVISED. Pp. i-xii + 175. With 54 Illustrations. 

 Price 3s. 6d. 



PRACTICAL MECHANICS: 



Applied to the Bequirements of the Sailor. 



BY THOS. MACKENZIE, Master Mariner, F.R.A.S. 



GENERAL CONTENTS. Resolution and Composition of Forces Work done 

 by Machines and Living Agents The Mechanical Powers : The Levei 

 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 Rope : 

 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. 



" WELL WORTH the money . . . will be found EXCEEDINGLY HELPPUL." 

 Shipping World. 



" No SHIPS' OFFICERS' BOOKCASE will henceforth be complete without 

 CAPTAIN MACKENZIE'S * PRACTICAL MECHANICS.' Notwithstanding my many 

 years' experience at sea, it has told me how much more there is to acquire," 

 (Letter to the Publishers from a Master Mariner). 



WORKS BY RICHARD C. BUCK, 



of the Thames Nautical Training College, H.M.S. ' Worcester. 



THIRD EDITION, Revised and Corrected. Pp. i-viii + 113. 

 With 38 Illustrations. Price Ss. (id. 



A MANUAL OF TRIGONOMETRY: 



With Diagrams, Examples, and Exercises. 



** Mr. Buck's Text-Book has been SPECIALLY PREPARED with a view 

 to the Examinations of the Board of Trade, in which Trigonometry 

 is an obligatory subject. 



"This EMINENTLY PRACTICAL and RELIABLE VOLUME ' 



SECOND EDITION, Revised. Pp. i-viii + 158. Price 3s. 6d. 



A MANUAL OF ALGEBRA. 



Designed to meet the Requirements of Sailors and others. 



%* These elementary works on ALGEBRA and TRIGONOMETKT are written specially for 

 those who will have little opportunity of consulting a Teacher. They are books for " SELJ- 

 HBLP." All but the simplest explanations have, therefore, been avoided, and ANSWER? to 

 the Exercises are given. Any person may readily, by careful study, become master of their 

 contents, and thus lay the foundation for a further mathematical course, if desired, it is 

 hoped that to the younger Officers of our Mercantile Marine they will be found decidedly 

 ervioeable. The Examples and Exercises are taken from the Examination Papers set for 

 the Cadets of the "Worcester.' 



"Clearly arranged, and well got up. ... A first-rate Elementary Algebra." 

 Nautical Magazine. 



LONDON: CHARLES GRIFFIN & CO., LIMITED, EXETER STREET, STRAND. 



