carried above the ordinary back sight, and by the semi-transparent film. phragm covered with an opaque coating, on which is may be easily and quickly removed, held as it is by a Much of the difficulty experienced by novices depends cut a cross. Photo, taken through a Bight. Fig. 1.—The Sight on a… … Fig. 5.—Grubb Sight on a Six-Inch Rapid-Fire Gun. Fig. 6,—Optical Principle of the Grubb Sight. A NEW GUN-SIGHT WHICH DOES AWAY WITH THE ORDINARY FORESIGHT. bayonet joint arrangement and a small spring catch. upon the impossibility of seeing the ordinary foresight The manner in which this optical…
Canal · Motor · Panama · Munn · Scientific American · Cents · Tific american · Post office · American supplement · York city · American supplements · Water motor · Average speed · Grubb sight · Panama canal
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