Archived Content Notice
: This publication is provided for reference, research or recordkeeping purposes. It is not
subject to the Government of Canada Web Standards and has not been altered or updated since it was archived. Please contact us to
request a format other than those available.
A program machine for automatic operation of the Ottawa P.Z.T.
; Hollinsworth, V E; in, The Ottawa photographic zenith
telescope; and Method and formulae used in P.Z.T. plate measurement; and A program machine for automatic operation of the Ottawa
; Thomson, M M; Tanner, R W; Hollinsworth, V E. Publications of the Dominion Observatory, Ottawa vol. 15, no. 4, 1955 p.