[Illustration: Plate 1. ‘Royal Sovereign’ ‘Camel’ TRIAL OF HARVEY’S SEA TORPEDO. Kell Bros. Lith. London.] INSTRUCTIONS FOR THE MANAGEMENT OF HARVEY’S SEA TORPEDO. LONDON: E. & F. N. SPON, 48, CHARING CROSS. PORTSMOUTH: J. GRIFFIN & CO. DEVONPORT: J. R. H. SPRY. 1871. LONDON: PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STREET AND CHARING CROSS. INSTRUCTIONS FOR THE MANAGEMENT OF HARVEY’S SEA TORPEDO. To impart a thorough knowledge of the management of such an arm as the sea torpedo is a matter of easy accomplishment by personal explanation; especially so, when the arm is in the water, and practised with under conditions that would obtain in its application to the disabling of, or to the destruction of vessels against which it may be employed. But in the absence of such mode of instruction, the following directions are offered, with a hope that they will prove sufficiently explanatory of an arm, which, like other arms, requires skill and aptitude in using it effectively. By the instructions here given, it must be understood, there are two torpedoes; though both are of the same kind, they differ in construction, by reason of the difference in the position of their respective planes, so that one may diverge to port, and the other to starboard; the direction of the divergence is known by the position of the slings and rudder. There is a like difference in the exploding bolts; the bolts which respectively belong to the port and starboard torpedoes are known by the direction of their safety keys. [Illustration: (A) STARBOARD TORPEDO.] [Illustration: (B) PORT TORPEDO.] The sea torpedo has the advantage of exploding only when in hugging contact with the vessel attacked; the levers by which it is exploded are so placed in relation to the tow-rope, that either the side or top lever is found invariably to act effectively in forcing down the exploding bolt at the instant of contact; this has been ascertained by the result of many experimental trials. The shape is an irregular figure, which can be best understood by reference to the drawings (p. 4). The dimensions of exterior case are as follows:— ft. in. ⎧ Length 5 0 Large Torpedo ⎨ Breadth 0 6⅛ ⎩ Depth 1 8¾ ⎧ Length 3 8 Small Torpedo ⎨ Breadth 0 5 ⎩ Depth 1 6 [Illustration: (C) SECTION (C).]