One of three photographs of Astronomical universal circles by F.W. Breithaupt & Sohn of Hessen-Kassel at the Strasbourg Observatory. One of three photographs of Astronomical universal circles 1876
One of three photographs of Astronomical universal instruments by F.W. Breithaupt & Sohn of Hessen-Kassel at the Strassbourg Observatory. One of three photographs of Astronomical universal instruments 1876
Mining transit theodolite, 3 inch, by F.W. Breithaupt & Son, Kassel, Hesse, Germany, 1850-1876 Mining transit theodolite, German, 1850-1876 1850-1876
Mining transit theodolite, 4-inch, with detachable side telescope in two boxes, by F.W. Breithaupt & Sohn, Kassel, Germany, 1910-1915 Mining transit theodolite, 1910-1915 1910-1915
Reflecting circle made by F.W. Breithaupt and Sohn, Kassel, Hessen, Germany, about 1870. Circular anodized brass frame, polished limb, a wooden handle. Signed on the index glass mount: F.W. Breithaupt & Sohn | Hessen Kassel. Inlaid silver scale from 0° to 140°, and twice from 180° to 80° every 20'. One index arm with a silver vernier at both ends, to 20", zeros at the right. The tangent screw, working against a spring-loaded stop, and the clamping screw are at the bottom of the index arm. Four half-coloured shades (two red, one green (broken), one missing); no horizon shades. Index-glass adjustment by screw; horizon prism without adjustment. Magnifier on a 120 mm swivelling arm serving both verniers, a frosted glass shade (missing). Threaded telescope bracket in two parts, fitted for correcting collimation error; perpendicular adjustment by rising-piece and a milled knob. Telescope (158 mm) inverted image, six parallel cross-wires and one at a right angle to them are engraved on a lens within the telescope; a rotating shaded eyepiece with choice of clear, green, red and blue. A prismatic eyepiece; some unidentified parts are missing. In a square fitted mahogany box containing a trade label for Breithaupt in Cassel and a MS list of contents. Prismatic reflecting circle with case. 1865-1875
Photographs (3) of Astronomical universal instruments Photographs (3) of Astronomical universal instruments 1876
One of three photographs of Astronomical universal instruments by F.W. Breithaupt & Sohn of Hessen-Kassel at the Strassbourg Observatory. One of three photographs of Astronomical universal instruments 1876
Chemical balance used by Dr. Andrew Ure (1778-1857), has a glazed wooden case and a long wooden drawer in the base, made by Breithaupt & Sohn, Cassel. Brass beam and pillar. Analytical balance by Breithaupt & Sohn, Germany, 1804-1830 1804-1830