A magnificent and rare 18th-Century trigonometer,

Details
A magnificent and rare 18th-Century trigonometer,
signed G.F. Brander fecit Aug. Vind., the satin birch folding rule with punched scales 0-300 on both sides of each arm, the shaped base with canted and chamfered mount arranged to slot into the lower arm, with two adjustable screw feet to set against the single screw foot at the head of the lower arm, the lacquered-brass arc mounted on the side of the lower arm, with turn-screw and plug, finely scratched with the figure 19 on the arm, and mounted so as to locate by knurled screw the rule divided 5-75, with sub-divisions, in the hinged support with silvered pointer, with tangent-screw fine adjustment and clamp, secured by a peg at the end of the tangent screw, with the upper arm with prismatic mirror, eyepiece, shade, supplementary pin hole and cross-wire sights, sighting limb with five pin holes, two additional hook-shaped sighting arms with cord tensioners, brass plummet with cord and peg, and bubble level for table or instrument mounting, contained in two red-stained chamois leather and paper-lined, gilt galoon-edged drawers, in the original stained pine and fruitwood case, the sliding end cover fixed with a collector's trade label printed Eigenthum des Jos. V. Zallinger, and inscribed in ink Vive II. 143. 135. Z. N. 78 II 86., the case -- 19in. (49cm.) long

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Lot Essay

The Zallinger cabinet of instruments and scientific books was assembled for his own use by Josef Pieter Zallinger (1730-1805) who stemmed from a family first recorded in Augsburg in the 13th century. He studied philosophy at the University of Innsbruck, concentrating on mathematics and physics, later becoming renowned as an architect and engineer in Tryrol, being responsible for the building of bridges and for various drainage schemes which transformed high-lying valleys and bogs into valuable agricultural land. He was the first to fit lightning conductors to church towers in the Tyrol.
The majority of his instruments were ordered to his own specifications from the eminent Augsburg instrument maker Georg Friedrich Brander. Zallinger himself also adapted and assembled instruments for electrical experiments. Mention is made of his use of electrophors to aid his experiments into lightning conductors. At the time, electricity was considered part of medical science and Zallinger willingly lent his instruments to doctors. He himself successfully extracted a nail painlessly from a child's nose with a magnet weighing 10 Viennese pounds. He was evidently also interested in optics and demonstrations of the properties of light. He is noted as having a valuable concave mirror with which magical views could be projected.
The largest extant group of known instruments by Brander is at the Deutches Museum, Munich, the capital of Bavaria, and the majority of instruments held there stem from the Bayerische Akademie der Wissenshaften which received these instruments from the scientific cabinets of various monastaries consequent on their secularisation in 1803. It is noteworthy that Zallinger's collection at his death in 1805, valued at 5,000fl., was considered comparable with those of various monastaries and leading universities of the time and was much admired by his contemporaries.

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