cer s ri LA peg eRTE Ce: SOPR DE ESE OLE ETAT EE TER nine Sp eT RR 7 Sp ei ee Sra ny ete eS es). eS SPE o es ad — Project 23.3 = Time Interval Measurements - H. B, Keller sy The only photographic diagnostice done on the the standard Christmas tree experiment. (Apeche) device wes The long base line (9 1/2 miles) from Station 2301 to zero site was a novelty, but results indicate that this was of no significance, Seven cameras were used on the experiment because it was as easy to set and run seven cameras as two or three. Visibility over the 9 1/2 mile range was good, and all seven cameras produced good records, » bade interstece DELETED POR Avril Sips teBe PEST 8 Ste SNL 53 i? -~ 53 -