. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 178 J. BUCK AND J. F. CASE replies to paired flashlight signals. Specimens were stored in dim room light in 35 X 65 roni plastic vials with white snapcaps, humidified with paper toweling dampened wiiH ucrose solution, and used for up to 10 days. Prior to experimentation ile was dark-adapted for at least 15 minutes and tested repetitively with j signals until response was stabilized. Experiments were run between 6:00 a.m. ana il:00 p.m. Usually four females were tested simultaneously in a light-tight box 1 m long in which a f

- Image ID: RHMGWT
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 178 J. BUCK AND J. F. CASE replies to paired flashlight signals. Specimens were stored in dim room light in 35 X 65 roni plastic vials with white snapcaps, humidified with paper toweling dampened wiiH ucrose solution, and used for up to 10 days. Prior to experimentation ile was dark-adapted for at least 15 minutes and tested repetitively with j signals until response was stabilized. Experiments were run between 6:00 a.m. ana il:00 p.m. Usually four females were tested simultaneously in a light-tight box 1 m long in which a f
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Image ID: RHMGWT
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 178 J. BUCK AND J. F. CASE replies to paired flashlight signals. Specimens were stored in dim room light in 35 X 65 roni plastic vials with white snapcaps, humidified with paper toweling dampened wiiH ucrose solution, and used for up to 10 days. Prior to experimentation ile was dark-adapted for at least 15 minutes and tested repetitively with j signals until response was stabilized. Experiments were run between 6:00 a.m. ana il:00 p.m. Usually four females were tested simultaneously in a light-tight box 1 m long in which a female was stationed in each of four 7 X 10 X 15 cm compartments at one end, shielded from the other females by light baffles (Fig. 1). Controlled flashes from one or from two Sylvania 911 glow modulator lamps were conducted singly or con- secutively by light guides to a diffusing surface at the other end of the box so as to illuminate each compartment equally. The response flashes of each female were de- tected separately via an RCA 1P21 photomultiplier viewing her chamber from above. Each female was placed in a chamber still in her residence vial, which was inverted so that the white cap would reflect her flashes to the photomultiplier. Durations and times of presentation of glow lamp flashes were controlled by a pair of Grass S44 stimulators. Temperature in one vial and in the main chamber was monitored via separate thermistors. Temperatures during experimentation varied between 21° and 24°C at the start of a day's work and commonly rose about 1° by the end. In another study we found temperature coefficients of several elements of the female's photic response to be slightly above 2 (Case and Buck, in prep.). Ambient temperatures thus should be considered when measurements from different days are compared or pooled. How- ever, most of our data are from single days (maximum 1 ° change) and often from TRIGGER!. GM POWER SUPPLIES GLOW MODULATORS N.D. FILTERS BIFURCATED LIGHT

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