A 1890 theodolite by Pietro Merli, a rather unknown maker of topographic instruments from Milan.
The theodolite is regarded as the top among topographic and geodesic sensing tools because it allows to define the position of a sighting point both horizontally and vertically thanks to its azimuthal and zenithal circles which are graduated through the full 360 degrees and sub-degrees, thus defining the exact location of the pointing telescope. In addition to this there is also a high precision compass, of fundamental importance in surveying unexplored territories and mines.
Dimensions of the instrument: Height 23 cm, maximum width 15 cm.
- Pietro Merli, Milan, Topographic theodolite
- Brass, Steel
- Estimated Period
- around 1890
- Country of Origin
- Good condition - used with small signs of aging & blemishes