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Log

PagePlateClassObjectR.A.DecStartObs H.A.Obs DecStopExpDateMiscellaneous
82Dec 16 1899x 12353 Perforated brass on plate. Intended exp. = 10s but dome stuck on image giving 20s: aperture of dome. = 3 inches.
82Dec 16 1899x 12354 Aperture as in last.
82Dec 16 1899x 12355 Aperture as in last.
82Dec 16 1899x 12356 Aperture as in last and perforated brass.
82Dec 16 1899x 12357 Aperture as in last.
82Dec 16 1899x 12358 Aperture as in last.
82Dec 16 1899x 12359 Aperture as in last and perforated brass.
82Dec 16 1899x 12360 Aperture as in last.
82Dec 16 1899x 12361 Aperture as in last. Exp. about 2s.
82Dec 16 1899x 12362 Moon through perforated brass. Exp. approx. 5 sec. Ap. as in last.
82Dec 16 1899x 12363 Exp. approx. 5 sec. Ap. as in last.
82Dec 16 1899x 12364 Exp. approx. 2 sec. On a Seed process plate. Ap. as in last.
82Dec 16 1899x 12365 Small App. Ec. aperture. Seed process plate approx. 2 sec.
82Dec 16 1899x 12366 Same as last.
8212367Moon06 280 41 W+22.706 28Dec 16 1899x 12367 Same as last, except large Jp. Ec. Ap.
82Dec 16 1899Note: Plates (12341-12367) inches, taken during lunar eclipse of this date were standardized with the regular standardizing apparatus in the measures shown by the following diagram. Nos. 5, 4 3 2 1A represent the numbered apertures on the standard disc; while nos. 2, 4, 8, 16, 32 indicate the no. of seconds aperture no. 2 was exposed to the plate. [[diagram on left of numbered apparatus]]