Show Planes Start on oi Frisco Return Trip SAN FRANCISCO July 27 AP CAP Six Six army ary pursuit purit planes hopped off of from field here early this morning on a return trip to Mr r. r Clemens Mich over the air mall mail route the military usefulness of ot which they are Investigating The planes arrived arIve from Mt t. t I II I Clemens Thursday afternoon They Thy I expect to consume three days dayl on the return voyage approximately te the time they took In coming to the coast cot The squadron Is In command of Major Robert comman After the round trip Is completed a report will wi be made on the condition condition condi condi- tion ton of ot the air lane and its mill mili- ml- ml tar tary ary possibilities |