Project 28.4 - CROND EIrERDGUT - B. Reoriin THE ITewval MASAO B. VW. Rermet, A, Day, Den Westervelt Tue logaritimio phetehests (J-16 type) vith interference filters vere operated on Cherezkee) chet as backup for narrov-band, tine reselved bend spectrosespy. The photeheads recoried the guame ray exc! ted H, and WH} Teller emission vith oufficiont intensity end tise resolution te Femlt in e satiefactery mensurenent of the tine interval betvsen reactions. The cae oving a wont cgnis co(bet) ott, arte 0 fev inprovencnts ani notifications had teen incorperated te eliminate maltiple eveeps, The phetehseds were lesated again om the reef of Station 1890 in e Gelumidified “eg-house” together with the trigger Pidus. The drop deere opened at the <1 minute signal. The results obtained are Genenstrated im Fig. 18.4-1 and plettet in Pig, 18.4-2 anf 18.4-3. The upper tue traces of Fig. 18.4-1 shew the shot reserd ani the pre-shot eveep tine ealibration ef the NS channel, fhe filtration ia this chase) ecnsisted ef a 42004 narrov-bend pase PATIO interference filter, exe blue trenandtting blesking filter, one COMMING filter 5543, 5.15 am, end one SCHOTT BALS, dum, filter, SEST DELETED oo 9 The lever tus traces of Pig. 16.4-1 show the shot record of the f, eharme] end the ovecp tine calibration curve of the escillessope taken >efere the chet, Filtration eensisted of a 40604 narrow-band pase BAIRD

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