Objects
Unknown. Davis's quadrant, first half of the 18th cent.
Unknown. Davis's quadrant, first half of the 18th cent.
Number
МЛ-447
Title
Davis's quadrant
Date
first half of the 18th cent.
Author
Unknown
Material
palm wood
Dimensions
length 75.5
Annotation
Quadrant includes two arcs 22 and 72.5 cm in radius. Degree scale with divisions in 1° and numbering in two directions: 0-65 through 5 and 25-90 through 10 is on the smaller arc. On the face side of greater arc is degree scale with divisions in 10 and transverse scale for readings 0°,1. Numbering in 1° in two directions: 0-25 and 65-90. On the reverse side of the greater arc are: 2 calendar scales of North and South solar declination; degree scale of declinations with divisions in 1/4° (0-20°) and 5' (20-23°,5); Zodiac scale (0-30°) with divisions in 1/2°; equidistant scale 0-90.
Corpus
History of Science Monuments. 14th-19th centuries. Mikhail Lomonosov Museum