M. Gardner Sons Brass Theodolite Alidade, Glasgow A brass sightin...
M. Gardner Sons Brass Theodolite Alidade, Glasgow
A brass sighting and angular measurement instrument, equipped with a swiveling telescopic eyepiece mounted on a large vertical graduated circle. The circular base incorporates a glass-covered compass and a graduated horizontal circle, allowing for the measurement of directions and angles. The mechanical construction, featuring fine adjustments, openwork supports, and a spirit level attached to the telescope, is characteristic of 19th-century precision topographic and nautical instruments. The entire unit bears the manufacturer’s signature: “M. Gardner Sons, Opticians, Glasgow.”
Details: Period: 19th century, Origin: Scotland, Glasgow, Manufacturer: M. Gardner Sons, Material: brass, Instrument: theodolite alidade with telescope and compass, Height with telescope held horizontally: 24 cm, Condition: signs of use, patina, and slight oxidation consistent with its age.
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M. Gardner Sons Brass Theodolite Alidade, Glasgow
A brass sighting and angular measurement instrument, equipped with a swiveling telescopic eyepiece mounted on a large vertical graduated circle. The circular base incorporates a glass-covered compass and a graduated horizontal circle, allowing for the measurement of directions and angles. The mechanical construction, featuring fine adjustments, openwork supports, and a spirit level attached to the telescope, is characteristic of 19th-century precision topographic and nautical instruments. The entire unit bears the manufacturer’s signature: “M. Gardner Sons, Opticians, Glasgow.”
Details: Period: 19th century, Origin: Scotland, Glasgow, Manufacturer: M. Gardner Sons, Material: brass, Instrument: theodolite alidade with telescope and compass, Height with telescope held horizontally: 24 cm, Condition: signs of use, patina, and slight oxidation consistent with its age.
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