LXXXVI ROYAL SOCIETY OF CANADA 
1909. FALL TERM. 
Oct. 11.—"" Phases of Work in a Modern Observatory,” by Prof. E. B. 
Frost, Director Yerkes Observatory. 
Oct. 21.—(1) “Collimation of Correcting Lenses,” by J. S. Plaskett, 
B.A. 
(2) “Determination of a Comet’s Orbit from Three Obser- 
vations,’ by R. M. Motherwell, M.A. 
Nov. 4.—‘‘Some Scientific Crumbs from Europe,” by Dr. Otto Klotz, 
F.R.AS. 
Nov. 18.—“The Winds of the Globe,” by R. F. Stupart, Director 
Meteorological Service. 
Dec. 21.—“The Gyroscope and Gyroscopic Action,’ W. F. King, 
C.M.G., LL. D. 
Dec. 16.—Annual Meeting. 
1910. SPRING TERM. 
Jan. 13.—“A Comparison of Astronomic and Geodetic Survey Data 
and the deduced truths therefrom,’ by W. Maxwell 
Tobey, B.A. 
Jan. 27.—“ Our Earth in the Universe,” by Dr. Otto Klotz, F.R.A.S. 
Feb. 10.—‘ How the Camera is Applied for Topography,” by J. J. 
McArthur, D.L.S. 
Feb. 24.—“Optics of the Telescope and Spectroscope,” by J. S. Plas- 
kett, B.A. 
Mar. 10.—(1) “Flexure in the Axis of a Meridian Circle,’ by R. M. 
Stewart, M.A. 
(2) “Latitudes,” by F. A. McDiarmid, B.A. 
Mar. 24.—“ Determination of the Constitution and Radial Motion of 
the Stars,” by J. S. Plaskett, B.A 
Apr. 7.—“Measurement of Geodetic Base-Lines with invar tapes 
and wires,” by P. A. Carson, B.A 
Apr. 21.—“Stellar Evolution and Theories of World Building,” by 
J. S. Plaskett, BA 
May 3.—(1) “Diffraction Grating of the Solar Spectroscope,” by 
R. E. DeLury, Ph. D. 
(2) “Effect of Sit Width in Spectroscopic Work,” by J.S. 
Plaskett, B.A. 
May 19.—“Comets and Halley’s Comet,” by Otto Klotz, LL.D. 
This address was the last of the series for the autumn and spring 
terms, and it remains but to say that the course of lectures and addresses, 
scientific ones in the afternoon and popular ones in the evening, was 
highly successful and undoubtedly had the effect of creating an 
increased interest in astronomical studies. 
