theodolite

Zeiss automatic theodolite
Manufactured by Carl Zeiss, W. Germany. Serial No.9900623 An Automatic theodolite which measured and displayed distance, horizontal bearing and vertical angle.	click for larger image
Wild DI3 distance meter
Wild Heerbrugg Switzerland Serial No. 32181 The DI 3 was designed to be mounted on the tripod with the theodolite. The control unit fitted on the tripod, the theodolite on top of the control unit, the sending/receiving unit on the theodolite and the battery on one of the tripod legs. The unit was more portable than the DI 10 which it replaced in the mid l970's. A built-in facility provided the ability to reduce distances for slope. Courtesy of Sokkia.	click for larger image
Theodolite
Troughton and Simms Serial No. 759 A Vernier theodolite direct reading to 30 seconds. This instrument has had extensive use and is in poor condition with bent vertical standard. The telescope has a fitting to allow the attachment of an auxillary telescope to allow steep or vertical sights to be made. The auxiliary telescope is marked Saeg Muller's Pat. May 8, l981 An auxiliary telescope with bubble attached and provision for a vertical circle (currently missing). The auxiliary telescope attaches to the main telescope of the theodolite at item 62 and enables observations of vertical (zenith or nadir) or near vertical lines which could not be observed through the normal telescope. Mostly used in mining surveys.	click for larger image
Auto Reduction Tacheometer
Cooke, Troughton and Simms, Ltd. Serial No. 17846 University of Melbourne No. 6655 A Vernier theodolite specifically designed for tachometric survey. Pointers in telescope move automatically with changes in the vertical angle of the telescope, to give direct reduction for height and distance.	click for larger image
Protractor
Negretti and Lambra, London. An eight inch brass protractor with two vernier arms graduated for direct reading to 20 seconds of arc. A clamp and slow motion screw is provided for reading of the scale. Arms extend to 12 inches for precision of plotting and an etched glass centre is provided for positioning.	click for larger image
Portable Transit Instrument
Troughton & Simms, London Serial No. SG0 102 Six inch circle direct reading to 30 seconds. Can be reversed in Y's, face right and face left. This instrument is normally set in the plane of the Meridian for observing star transits, for time and longitude determination. The use of a striding level for the horizontal axis is essential.	click for larger image
T4 Astronomical Theodolite
Manufactured by Wild Heerbrugg Switzerland Serial No. 22675 University of Melbourne No.24560 Mounted on Tripod in Hallway. This instrument was first produced in 1941. It is specially designed for precise astronomical observations. The image formed by the telescope is viewed through one end of the trunion (horizontal) axis. Readings of both the horizontal and vertical circles are made with an optical coincidence micrometer giving the mean of the readings on each side of the circle. Horizontal circle is 10 inches giving direct reading to 0.1 second of arc and the vertical circle is 3.5 inches reading direct to 1 second of arc.	click for larger image