Identifier: reportofbritishn01good (find matches)
Title: Report of the British naval and military operations in Egypt, 1882
Year: 1883 (1880s)
Authors: Goodrich, Caspar F. (Caspar Frederick), 1847-1925
Subjects:
Publisher: Washington, Gov't print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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flow is regulated by the tap a. At b is a small hole providedwith a darkened eye-piece, so that the signal-man may inspect and adjustthe light without injury to his eyes. On a clear dark night this lightcan be seen over 20 miles. The hand lantern is used for distances notexceeding from 4 to 6 miles. It burns colza oil. •I Use of the duplex mirror in heliographing. 283 A view of the exterior with dimensions is given in Fig. 147. Thekey for operating the shutter is conveniently placed at the top of thehandle. Both forms of lantern are supplied 03- J. De Fries & Sons,London. Each cavalry regiment in the British army has four non-commissionedofficers and eight men in their signal corps, or four complete stationsof three men each. Each infantry battalion has two uon-commissiouedofficers and four men, or two stations. In addition, each cavalry troopand infantry company has a supernumerary trained signal-man. The instruction and practice necessary to keep the signal-men and Fig. 14S. *
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supernumeraries up to their work is conducted by a specially selectedofficer of the regiment or battalion, and amounts to three days perweek for the former and one day for the latter. A quarterly return ismade to the lieutenant-colonel commanding by this officer, giving thenames and proficiency of the men under his instruction. One columnof the return calls for the rate of sending, as a comparative test.It has been found that if the letters of the alphabet be repeated threetimes, mixed together, and then separated into twenty groups of un-equal length, the time occupied in their transmission is the same as that 284 required for a message of twenty words of different lengths averaging-five letters to the word. The time spent in sending this message isthen reduced to words per minute. Ten is considered fair signalingwith large flags, but higher rates are reached with the small flag, lamp*and heliograph. The signal officers and men of the regiments and battalions are sentto the Camp of M

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