Interior of the 74-inch building at Radcliffe Observatory, Pretoria, showing the north pier, the RA assembly and the mirror end of the telescope, seen from below and looking south-west. The telescope is to the east. Note the protective string-tied wrappings around the circles. Below the mirror c...
The 24-inch Bruce Telescope with open roof and two people, 1931.
Scope & Content:
The 24-inch Bruce telescope and enclosure, seen looking north-northeast. The roof is open and the telescope is east of the pier, pointing north-west. The dewcap has been removed. Two people stand near the counterweight. A packing crate lies near the north-west corner of the building, and another...
Three people inside the 13-inch building, at the eyepiece end of the 13-inch refractor, which is pointed nearly vertically. The back end of the refractor is missing. One of the persons is standing on top of a ladder beneath the open end of the tube and is almost wholly inside the tube. The two o...
A collection of images of the 60-inch telescope at Boyden Observatory, and its mounting, under construction. These form part of a series of images of the construction of this facility, which is dated to May 1932. A faded pencilled note on the plate box reads: "60[inch] telesc no2". n/a. Extent...
Installing the polar axis of the 60-inch Rockefeller Telescope.
Scope & Content:
Interior view of the 60-inch Rockefeller building under construction. The polar axis of the mount is suspended by a crane and is positioned near the north pier. A person, wearing a hat, is seated on the axis near the cross head. The walls are not yet clad and buildings are visible in the backgro...
Installing the polar axis of the 60-inch Rockefeller Telescope.
Scope & Content:
Interior view of the 60-inch Rockefeller building under construction. The polar axis of the mount is suspended by a crane and is positioned near the north pier. A person, wearing a hat, is seated on the axis near the cross head. The walls are not yet clad and buildings are visible in the backgro...
The north pier of the 60-inch Rockefeller, showing the RA wheel & circle, a short section of the polar axis, and the drive assembly with the cover removed. n/a. Extent: 1 glass plate. Size and dimensions of original material: Height 8.2cm, width 10.7cm, thickness 0.3cm. Condition of orig...
The primary mirror cell and lower portion of the telescope tube. The J.W. Fecker nameplate is partially visible at the top of the image; it is dated 1930. A portion of the RA circle can be seen in the background. n/a. Extent: 1 glass plate. Size and dimensions of original material: Height 8.2...
Looking down into the pit of the 60-inch Rockefeller, facing roughly south. The polar axis and declination counterweight are in place, as is the empty cradle for the telescope tube. The tube is shown at the right of the image, standing upright and encased in a wooden structure. The walls of the ...
The plate holder at the Newtonian focus of the 60-inch Rockefeller Telescope
Scope & Content:
Side view of the plate holder of the 60-inch Rockefeller Telescope. The telescope tube is covered by a white shroud. A hand controller can be seen below the plate holder. PLB20_0006 and PLB20_0007 are similar. n/a. Extent: 1 glass plate. Size and dimensions of original material: Height 8.2cm,...
