DMM 63898

Museum: Deutsches Museum, Munich

Title: Sector by N. Bion

Inventory number: DMM 63898

Signature: "N. Bion A Paris." 

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

Material: Brass

Dimensions: Lenght of limb: 165 mm; width: 16 mm

Description: See Schneider, 1970, p. 87. 

Preliminary examination of the metallic scales: The front presents a metallic line with 6 values. Planetary symbols on the metal scale, indicated a "Les Metaux". Two other scales, each on a face, when the sector is opened at 180 degrees, on the border. Called respectively "poids des bouletz" and "Calibres des pieces".

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

Maurice, Daumas: Les instruments scientifiques aux XVIIe et XVIIIe siecle. Paris, 1953, p. 109f.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

 118,5

♄ [Saturn, Lead]

 140

☽ [Moon, Silver]

 145,5

♀ [Venus, Copper]

 152

♂ [Mars, Iron]

 158

♃ [Jupiter, Tin]

 162,5

"Calibres des pieces"

1/4 33
1/2 42
1 tt 53
2 67
3 77
4 84
5 91
6 97
7 12
8 106
9 110,5
10 114,5
12 121
15 130,5
20 144
25 155
30 165
35 174
40 181
45 188
50 195
55 201
60 207
64 212

"poids des bouletz"

1/4 32
1/2 40,5
1 tt 51
2 65
3 74
4 81,5
5 88
6 93
7 98
8 102
9 106,5
10 110
15 126
20 139
25 149,5
30 159
35 167
40 175
45 182
50 188,5
55 195
60 200
64 205