Resting the horses from hauling the polar axis to the Dominion Astrophysical Observatory
Resting the horses from hauling the polar axis to the Dominion Astrophysical Observatory
Pier to support telescope, Dominion Astrophysical Observatory
Dominion Astrophysical Observatory, wall sealed with telescope inside
Workers resting after completing telescope, Dominion Astrophysical Observatory
Dr Plaskett with completed telescope, Dominion Astrophysical Observatory