. Transactions of the Institution of Mining Engineers . Fig. 1.—Back View of Beam Fig. 2.—Side View of Beam Electric Head-lamp as Worn. Electric Head-lamp as Worn. that there can be absolutely no tampering on the part of ordinaryworkmen. The weight of the lamp proper is 3f ozs., and with fullattachments is 4 pounds, or 2 pounds less than the Ceag. For thelast two years I have worked personally with the lamp, and under a 1920-1921 ] McNAUGHT—THK BEAM ELECTRIC HEAD-LAMP. xv variety of conditions it has given complete satisfaction. For repairwork—even in the haulage roads—I have found it highly s
. Transactions of the Institution of Mining Engineers . Fig. 1.—Back View of Beam Fig. 2.—Side View of Beam Electric Head-lamp as Worn. Electric Head-lamp as Worn. that there can be absolutely no tampering on the part of ordinaryworkmen. The weight of the lamp proper is 3f ozs., and with fullattachments is 4 pounds, or 2 pounds less than the Ceag. For thelast two years I have worked personally with the lamp, and under a 1920-1921 ] McNAUGHT—THK BEAM ELECTRIC HEAD-LAMP. xv variety of conditions it has given complete satisfaction. For repairwork—even in the haulage roads—I have found it highly machinemen and haulagemen who have used the lamp are fullysatisfied with it, and the Home Office has signified its approval of it,. Fig. 3.—Details of Beam Electric Head-lamp. which means that it can be used in any mine after permission has beengranted by the Inspector of Mines for the district. The price of thelamp has not yet been fixed. At Girvan, where it is in daily use, thoseusing it are satisfied that the cost of maintenance is not any greater thanthat incurred in the use of other electric lamps. xvi IMPORTANT NOTICES TO MEMBERS. Sale of Transactions. Copies of Vols. I. to LIX. (lacking Vols. XXXVIII. and XXXIX., which are now outof print) of the Transactions of The Institution of Mining Engineers will be supplied t(Members only, to complete their sets, in paper covers, for £38 Os.; and single volumecan be supplied at the following rates ; -Vols. I. and XLI. at £2 each ; Vols. II. and £1 OS each; Vols. IV. to XXIIL, XXVI. to XXIX., XXXIL, XXXIII., XXXV, andXLII. to LIX., at 10s. each; Vols. XXIV., XXV., XXXI., XXXIV., XXXVI., andXXXVII., at £1 each; Vols. XXX. and XL., at £1 10s. each; duplica
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
