| record number: | 31 |
| instrument type: | level with horizontal circle (transit) |
| manufacturer: | Breihaupt & Sohn Kassel |
| serial number: | 57655 |
| weight: | 3.64 kg |
| dimensions (l/w/h): | 34/15/19 cm |
| year of manufacture: | 1920 |
| instrument set up: |
levelling toric level
without tilting screw and circular level |
The level with a horizontal circle (German: Nivelliertachymeter), made in 1920, is the only instrument in the University of Ljubljana, Faculty of Civil and Geodetic Engineering collection from one of the oldest manufacturers of surveying instruments in the world. The level is unusually robust. It weighs 3.6 kg, which is about one third more than a level of comparable design. The instrument was mainly used to measure height differences, and the horizontal circle and the Reichenbach crosshairs also allowed detailed measurements on horizontal terrain.
The instrument was cleaned and partially lacquered in 2016.
Characteristics
| horizontal circle | ||
|---|---|---|
| diameter: | unprotected, 14 cm | |
| type of division: | engraved division | |
| limb implementation: | silvered metal bracket | |
| division: | sexagesimal/sexadecimal | |
| unit: | 30' | |
| Reading | ||
| number of reading points: | 1 | |
| reading device: | vernier | |
| number of units: | 30 | |
| graduation unit: | 1' | |
| Telescope | ||
| diameter of objective: | 30 mm | |
| magnification: | / | |
| type: | telescope with internal focusing | |
| cross hairs/reticule: | Reichenbach's crosshairs, constant 100 | |