Plaskett Report for October 1931

While the local meteorological statistics show an excess of sunshine for the month, the clear sky at night was less than average. Several good nights were secured in the early part of the month but few later. On 15 nights with 109.4 hours observing, a total of 96 plates were secured. The twelve-year average for October shows 17 nights, 126.3 hours and 138 plates.

[Dr. C.S. Beals and Dr. F.S. Hogg has recently arrived in Victoria and Miss Lora M. Blake, the Clerk-Stenographer, welcomed them, Ed.]

Mon, Oct 19, 1931 – 6 · Times Colonist (Victoria, British Columbia, Canada) ·

Director J.S. Plaskett did computations of mean parallax of several groupings of stars containing interstellar lines and re-determination of the rotational constant. Writing of text of publication on diffuse matter. Usual correspondence and administrative duties.

Assistant Director W.E. Harper observed 4 nights securing 33 plates. Measured for radial velocity 50. Gave one seminar talk and one public address.

Astronomer J.A. Pearce observed 4 nights, obtaining 36 plates. Measured 5 spectrograms for radial velocity. Obtained preliminary values of the absolute magnitude of 3180 O and B type stars, determined by the intensity of the interstellar K line in their spectra.

Astronomer C.S. Beals observed 4 nights, obtaining 6 plates. Prepared paper on photo-electric microphotometer. Gave one seminar talk.

[Beals’ arrival in Victoria was noted in the October 1, 1931 Victoria Daily Times, Ed.]

Thu, Oct 1, 1931 – 6 · Times Colonist (Victoria, British Columbia, Canada) ·

Astronomer F.S. Hogg observed 3 nights securing 21 plates. Measured 2 plates. Plotted observing chart for planetary nuclei programme. Computed one dispersion table. Constructed gnomograph for precession to 1932.5. Gave one colloquium.

Computer S.N. Hill computed proper motion μ and position angle φ for B stars and deriving Raymond’s revised correction in declination and introducing this correction in the atom computations. Deriving function χ for B stars and computing τ and υ components. Computational work in connection with measurement and reduction of band spectra. Preparing drawings for article in Monthly Notices.

Clerk-Stenographer L.M. Blake handled envelopes and computations for 96 plates. Accounts, correspondence and usual typing in connection with lectures and articles for publication. Library assistance. Assisted with preparation for mailing of publications.

Astronomical Assistant T.T. Hutchison assisted in observing on 12 nights. Kept telescope in running order.