Show op 00 AIR MAIL BEACONS GO INTO OPERATION SALT S LAKE Jan Beacon 29 2 tights to guide x air airmail mall mail aviators be- be between tween Salt Lake and Rock Springs were flashed l on Thursday Thur day night tor orthe the first time The beacon beaton nearest to the th city is on the mountain east or of FL It Ft Douglas At At e each ch beacon a 8 wind driven dynamo keeps storage batteries tilled filled to capacity An electric mo- mo motor motor mo motor tor revolve Te the light six she times a amID minute mID te The light flashes not onlY but also on dark and foggy days being beins regulated by a sun valve e oo 00 |