Skruemikrometer

International names:

Heliometer

Danish Instrument Inventory text:

Telescope. Gregorian. Brass tube Dia70 L330. Semicircle with worm gear adjustment of altitude. Azimuth adjustment. Eye piece Dia26 L88. Secondary mirror adjustable from front. Micrometer (Heliometer), 2 halflens, Dia57. Fitted mahogany box 490x230x125, mahogany box for heliometer.Ref: Det phys Cab vol 2 p 124.Signed on the heliometer: J.Dollond / Invenit et Fecitc1760 (Hauch states that the maker is »Dollond the father«

• Category: Light
• Hauch number: F71
• Inventory number: 5581
• Danish Instrument Inventory number: 1663

• Hauch references:
• Begynd.grund: §0
• Cabinet 1: 2124 39,04

• Literature: