DMM 40082

Museum: Deutsches Museum, Munich

Title: Sector by N. Bion

Inventory number: DMM 40082

Signature: "N. Bion A Paris." 

Date: End of the 17. century/ beginning of the 18.

Material: Brass

Dimensions: Lenght of limb: 91 mm; width: 10 mm

Description: See Schneider, 1970, p. 87.

Preliminary examination of the metallic scales: The front presents a metallic line with 6 values. Approximately half the size of usual Bion sectors. Planetary symbols on the metal scale, indicated a "Les Metaux". On the same face, a scale when the sector is opened at 180 degrees, on the border. Called "poids des boulets". 

ReferencesSchneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 87.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

53

♄ [Saturn, Lead]

68,5

☽ [Moon, Silver]

72

♀ [Venus, Copper]

75

♂ [Mars, Iron]

78

♃ [Jupiter, Tin]

80

"poids des boulets"

1/4 32
1/2 41
1 tt 51
2 63
3 73
4 80,5
5 85
10 107
15 123
20 135
25 146
30 155
33 160