_Griffin & Co., Publishers, 2, The Hard, Portsmouth._ ON THE RELATIVE MERITS OF SIMPLE AND COMPOUND ENGINES. Demy 8vo. 4s. 6d. By NIEL MACDOUGALL, Esq. With numerous Diagrams and Illustrations. "The Book will prove instructive and interesting to all engaged in Marine Engineering pursuits, and the Engineer Officers of the Royal Navy in particular are heartily recommended it."--_Broad Arrow._ "Mr. Macdougall has treated this much-debated and highly-important question of the Relative Merits of Simple and Compound Engines in a vigorous, practical, and highly creditable manner."--_Naval Science._ JOURNAL BOOK AND DIARY, For the use of the Officers of the Royal Navy. After the Style and Size of Letts's Diary. Containing Two Days on a page, with ruled paper, and a Printed Journal Form to each Day, for recording Course and Distance, Wind and Weather, Barometer and Thermometer, Latitude and Longitude, &c. Containing also a variety of useful information--Regulations and Course of Study for the Royal Naval College, Greenwich; Course of Instruction, Examination, and Regulations for passing through H.M. Gunnery Ships; Foreign Monies and their English Equivalents; and a Table showing the probable state of the ACTIVE LIST OF FLAG OFFICERS FOR THE NEXT TEN YEARS; also Notable Events--Navy and Army; Directions for making a Will; Area of the Principal States of the World; Passports, &c., &c. _Prices, strongly bound_:-- One year, 4s. 6d.; 2 years, 6s. 6d.; 3 years, 8s. 6d.; One year (interleaved) 5s. 6d.; 2 years (interleaved) 8s. 6d. "We would direct the attention of Naval officers to a very complete Naval Diary, which has just been compiled and published. It has only to be shown to be appreciated."--_U.S. Gazette._ OUR PERIL AFLOAT; OR, COLLISIONS AND HOW TO AVOID THEM. With Illustrations. 1s. By Captain P. H. COLOMB, R.N. (Gold Medalist, Royal U.S. Institution.) CONTENTS: Part I. The Rule of the Road at Sea: its history and present condition; Part II. The Theory and Practice of avoiding Collision at Sea; and the Regulations issued by Order in Council. _Griffin & Co., Publishers, 2, The Hard, Portsmouth._ NAUTICAL SURVEYING. By Commander MAY, R.N., F.R.G.S. Reprinted from "Alston's Seamanship." With Charts. 2s. 6d. "The treatise is simple and clear in arrangement, and written with the especial object of instructing the officers of the Naval Service in general, and only deals with the use of such instruments as are found on board of every man-of-war. We have never met with any treatise on nautical surveying by any means so well calculated to answer the purpose for which it was written."--_Naval Science._ THE MANUAL OF THE HYDROMETER. =2nd Edition.= Illustrated. Cloth. 3s. 6d. By LIONEL SWIFT, R.N.