The weather during the month of September was above the average as there were several nights with conditions decidedly above the average. There were obtained 220 spectrograms on 24 nights and parts of nights. I have to report that the last five or six days of the month were spent in preparations for and the moving into the new office building, a red letter time in the history of the observatory. All the staff are highly pleased with the accommodation and the conveniences for work and I am sure that we will be able to make an even finer record with the better facilities.

The office building in 1924 shortly after it was completed

Director J. S. Plaskett obtained 72 spectrograms on 7 nights and measured 30 spectrograms for radial velocity. Obtained approximate period and velocity curve for binary. Preparation for moving and greater than usual supervision of various works.

Research Astronomer W. E. Harper obtained 49 spectrograms on 6 nights and measured 82 spectrograms for radial velocity. Preparation for moving.

Astronomer H. H. Plaskett obtained 18 spectrograms on 4 nights. Prepared the observing programme of B and O-type stars for wedge spectrophotometry and designed a new wedge cell and support for standard lamp. Preparation for moving.

Summer Assistant W. H. Christie obtained 81 plates on 7 nights. Measured 80 plates for radial velocity and assisted in moving preparations.

Astronomical Computer S. N. Hill measured 24 spectrograms for radial velocity. Prepared 60 reduction cards for B-type stars. Work on the library in preparation for moving.

Senior Clerk Typist Miss H. R. Keay handled the usual accounts, correspondence, plates and reports. Read the proofs of Volume III, Numbers 2, 3, 4. Prepared reduction cards for Mr. Harper. Assisted in moving.

Instrument Make Foreman T. T. Hutchison assisted with observations on 19 nights and parts of nights. Took off the declination housing and repaired and painted mechanism. Assisted in moving.