1.
Brass quadrant in cardboard box. The instrument is used for angle measurement in the horizontal plane as well as for height measurement. For the latter, a plumb line has been added that can be placed in the appropriate slit. The lid of the box is hinged on one side and can be secured on the other sides with three brass hooks.
A grid has been applied to the square plateau, which is subdivided into 10 x 10 numbered areas, which in turn are subdivided into 4 areas each. The quarter circle has 2 degree divisions from 0 – 45 degrees.
Altitude quadrants are mathematical instruments that were used for simple surveying tasks.

Catalogue: NM.7-02
Date: ca.1850
HWL box: 4.7x17x17 cm
Signed: not signged
Origin: Sweden
Condition: in good and working condition, wear consistent with age and use, the top of the plateau is slightly corroded

2.
Very rare surveyor glass plate with rectangular pattern in marbled cardboard box for field map making. Made by P.A, Höglund, Stockholm.
Another Lantmätarepollett of Höglund is tot see in the Tekniskamuseet in Stockholm: https://digitaltmuseum.se/021026349071/lantmatarepollett.
The glass plate has been cleaned occasionally.

Catalogue: NM.7-02
Date: ca.1850
HWL carton: 0.8×16.5×17 cm
Signed: P.A. Höglund, mathematisk Instrumentmakare,
Stockholm, Norra Tullportsgatan no 65
Origin: Sweden
Condition: in good and working condition, wear consistent with age and use