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Show CURIOUS DEVICE USED FOR SEE'w AFTER DARK;' ,,j ii It is presumed that maJ nally toiled or played onh ' 1 hours of sunlight. That whit ness came and the eyes ( ' longer see he lay himse to rest. Yet all the while through volcanic and V1'1' disturbances, through fla:'' lightning, was trying to jc strate to man its power t ' 1 Ught in the midst of darkt Fire was discovered, v found he could prolong with the aid of firebrand " fires, torches. :i The earliest lamps of v,'X have record were saucer i;ei objects with a shallow pi: ' spout which held the wick ' ,', in the center of this disc-li:!; held a small quantity of r "i So far as is known, th 'in no radical development ?' better lighting until 1783 '"f when Leger of Paris dj' flat ribbon wick and bur :)',' long after, Ami Argand " 11 perfected a glass chimne;' together with his new i type of circular wick and jj produced illumination rior to anything ever bef .m Then in 1 8 80, Ai :, Welsbach, a German, dev".se burner, in which the con of a mixture of air anc ' " vapor, heated to incande;,.,, mantle, composed of th ' ceria. ? Welsbach's mantle course, crude and inefficii"J pared to present-day mar ' to Welsbach, should go the credit for making avi 1 us today, the pure whi 'J1 which is so easily and ; :J! cally provided in modem i'r mantle lamps using ga-f kerosene for fuel. |