Show Photographic Surveys I Discussed by Engineer C c. IT H. BIrdseye chief of at the topographic topo topo- I graphic department of ot th the United I States geological survey ey was the speaker at the weekly luncheon of ot All AU Engineers at the chamber of I commerce Monday Mr BIrdseye I discussed development nt of ot photographiC photographic photographic photo photo- I graphic graphic- surveys and their value alue from tram an engineering standpoint I Mr BIrdseye arrived her here beret Sunday Sunday Sunday Sun Sun- day to begin preparations for tor the survey party he will head I down tho the CoIo Colorado do river rl through I Marble and Grand canyons this summer Preliminary nary work ot of the I party will get under wa way at Flagstaff Flag Flag- liag-I liag I staff Ariz about July 16 18 The will take boat party at Lees Lee's ferry about August 1 for the trip down down- I I stream c nt S 0 down l S 5 S S J f 1 I I 5 1 |