Harrison In Hollywood Lucie Neville U pinch-hitting fir Paul Harrison, now touring army camps and defense industries. industries. By LXJCIE NEVILLE HOLLYWOOD--The order is going going around thc sets at 20th-Fox to cut out the horseplay and get to work; it costs too much to be funny. Tliis ultimatum from the business business office came after a perfect recording was ruined because a certain, star went to the monitor microphone while another top- actor was singing, turned on the current and spoke into the sound track. The joker would be terribly, terribly, Indignant if the money his cute little gag cost the studio were deducted from his paycheck. Barrynvore Memories Such production delays as John Barrymore's ad libbing (often unprintable) are accepted as a whim of the Great Profile, They always get a laugh, too, as when he was reading a letter in a serious serious scene in "World Premiere" the other day and forgot his lines. He hemmed and hawed, squinted at the paper, and finally said, "This letter brings fond memories --I never could read my third ! wife's handwriting." Movietown has hugged a newcomer, newcomer, Rene Clair, to its chuckling bosom because the Gallic director Â·has shown rare talent for ribbing. During production of "The Flame of New Orleans," he gave Mar- Icne Dietrich a serious talk before an emotional scene in which she was to open a door to face Roland Roland Young and register shyness, warmth, and eagerness. She opened it. instead, on a swaybacked, swaybacked, dilapidated horse which Clair had smuggled onto the set. Learning the fondness of his cameraman, Rudolph Mate, for shooting scenes through cigarcic smoke and soft mist, the director hired a workman to labor all on a fountain. Next day. Mate had his camera set to photograph Miss Dietrich through delicate jets of spray--but the fountain erupted not water but billowing clouds of smoke.