EL Karlstom 1956 Recording data Feb. 3 Are we exotic tree-frogs here? Possibly a novel species (pizera)?? RCS suggest a loose comparison with the Cornell "Sounds of the Night" record. Paul Anderson independently came up with acris but noted definite differences. He suggested the possibility of a mole cricket or other insect. Reel No. 10 Experimental recording of "protect" notes. First ~400 feet with Magnemite at Yosemite Museum too treble and noise from machine. #741 ELK B. boreas holophilus Yoz. Valley 746 & 747 B. canorus 694 B. dr. exsul Deep Sags. 200 feet with Yosemite Natural Visiting Association centum recorder (AC operated) will much better result. #807 B. br. h. good near end 820 B. can good warmed up and rate increased