CHAPTER II.

EXAMINATION OF FIRST-CLASS GUNNERS 111

(_a_) The Azimuth Instrument and Definitions 111 (_b_) The Plotting-board 116 The Range-board 123 The Deflection-board 128 The Telescopic Sight 136 Wind Component 145 The Aeroscope 146 Anemometer 149 Electric Stop-watch 149 The Atmosphere-board 150 Special Apparatus for Mortars 151 Battle-ships, Armor, etc. 151

EXAMINATION FOR TORPEDO-COMPANY GUNNERS 169 Second-class Gunners 169 Service of the Piece, Nomenclature 169 Duties in the Loading-room 174 Duties on the Water 181 Magazine Rifle, Description, etc. 186 First-class Gunners 186 Care and Preservation of Mine Material 186 Handling High Explosives 189 The Azimuth Instrument and Plotting-board 190 Storage Batteries 190 Generators 190 Searchlights 190 Oil-engines 195 Apparatus and Operation of Casemate Switchboard 198

THE GUNNER'S EXAMINER.