Theodolite

Troughton and Simms Serial No. 804 Circa 1880. A four screw theodolite, typical of many of its era. This instrument has had comparatively little use and could be restored to excellent condition. This represents the type of theodolite which gradually replaced the circumferenter compass for cadastral surveys in Victoria. In 1873 regulations were issued which required that surveyors must use a theodolite for these surveys. This is a transit theodolite i.e. the telescope could be rotated to point either forward or backwards. When properly levelled the basic function of a theodolite is to measure horizontal and vertical angles. It also has the ability to extend a straight line by transiting the telescope and to line in intermediate points along a line.	click for larger image
Theodolite (T2)
WILD T2 Serial No. 2023 The Wild T2 theodolite has been a standard instrument for precision surveys, including geodetic surveys, over many years. This is a rare example of the Wild T2 as, it is one of the first of that model and one the first theodolites to have a glass circle. This instrument needs cleaning as one of the vertical axes is jammed, possible with old lubricant. The instrument is circa 1927.	click for larger image