Transcriber’s Notes: Underscores “_” before and after a word or phrase indicate _italics_ in the original text. Equal signs “=” before and after a word or phrase indicate =bold= in the original text. Small capitals have been converted to SOLID capitals. Deprecated spellings have been preserved. Typographical and punctuation errors have been silently corrected. SPAR-TORPEDO INSTRUCTIONS FOR THE UNITED STATES NAVY. [Illustration] 1890. PREPARED AT THE TORPEDO STATION, BY DIRECTION OF THE BUREAU OF ORDNANCE. TORPEDO STATION PRINT. MAY 1890. _These Torpedo Instructions, revised and prepared at the Torpedo Station by order of the Bureau of Ordnance, are approved for use in the Navy._ _W. M. FOLGER_, _Chief of Bureau._ _Bureau of Ordnance_, _May 1st, 1890._ LIST OF PLATES. PLATE. I. Service Torpedo.—Pattern D. II. Exercise Torpedo.—Pattern D. III. Circuit-closer, Contact Torpedo.—Pattern B. IV. Fig. 1. Ship‘s Secondary Spar.—Pattern A. ” Fig. 2. Boat‘s Secondary Spar.—Pattern A. V. Contact Spar Leading-Wires.—Pattern B. VI. Spar-Torpedo Boat-Fittings.—Pattern B. VII. Junction of Tubes Forming Boat‘s Spar.—Pattern A. VIII. Fig. 1. Detonator. ” Fig. 2. Detonator Block. IX. Fig. 1. Permanent Wires. ” Fig. 2. Connections with Firing Key of “A” Machine. ” Fig. 3. Connections with Firing-Battery. X. Fig. 1. Electric Switch. ” Fig. 2. Terminal. XI. Heel Fittings for Ship‘s Spar. XII. Ship‘s Spar Fittings. XIII. Battery Cell. XIV. Battery Tester. XV. Fig. 1. Hand-Firing Key.—Pattern B. ” Fig. 2. Diagram Showing Hand-Firing Key in Circuit. XVI. Fig. 1. “A” Machine and Firing Key Connected. “ Fig. 2. ”C” Machine Connected. XVII. Fig. 1. Firing Key, Short-Circuit. ” Fig. 2. Firing Key, Testing Circuit. ” Fig. 3. Firing Key, Firing-Circuit. XVIII. Steam-Drier. CONTENTS. PAGE. CHAPTER I. Spar-Torpedo Outfit—General Description—Care and Preservation 1 CHAPTER II. Preparation of Torpedoes 17 CHAPTER III. Electrical Apparatus 27 CHAPTER IV. Gun-Cotton—How Packed—Stowage—Care—Inspection and Drying 39