| record number: | 8 |
| instrument type: | level with horizontal circle (transit) |
| manufacturer: | R & A Rost Wien |
| serial number: | 3572 |
| weight: | 3.8 kg |
| dimensions (l/w/h): | 38/17/20 cm |
| year of manufacture: | 1890 |
| instrument set up: |
circular level
levelling toric level by the telescope tilting screw on the front of the telescope supporting column |
The level with horizontal circle (transit) was made around 1900. A circular level is used for rough levelling, while a rotatable toric level attached to the telescope that can be removed provides the horizontal line of sight. The hairs, fixed on a metal frame in the eyepiece, provide the standard Reichenbach crosshairs. The correction screws of the crosshairs are clearly visible.
A horizontal circle with a resolution of 1' complements the instrument and turns it into a tacheometer, allowing detailed polar measurements on terrains with smaller inclinations.
The instrument was fully restored in 2016. According to the restorer's assessment, it is one of the most beautiful in the collection of the University of Ljubljana, Faculty of Civil and Geodetic Engineering.
| horizontal circle | ||
|---|---|---|
| diameter: | unprotected, open, 10 cm | |
| type of division: | engraved division | |
| limb implementation: | silvered metal bracket | |
| division: | sexagesimal/sexadecimal | |
| unit: | 20' | |
| Reading | ||
| number of reading points: | 1 | |
| reading device: | vernier | |
| number of units: | 20 | |
| graduation unit: | 1' | |
| repetition: | no | |
| Telescope | ||
| diameter of objective: | 27 mm | |
| magnification: | / | |
| type: | Ramsden's retractable eyepiece | |
| cross hairs/reticule: | Reichenbach's crosshairs, constant 100 | |