DMM 26953

Museum: Deutsches Museum, Munich

Title: Sector by Baradelle

Inventory number: DMM 26953

Signature: "Baradelle AParis"

Date: To be established.

Material: Brass

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

Description: See Schneider, 1970, p. 89.

Preliminary examination of the metallic scales: 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 Boulets" and "Calibre 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. 89.

Maurice, Daumas: Les instruments scientifiques aux XVIIe et XVIIIe siecle. Paris, 1953, p. 380.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

 117

♄ [Saturn, Lead]

 138

☽ [Moon, Silver]

 143

♀ [Venus, Copper]

 150

♂ [Mars, Iron]

 156

♃ [Jupiter, Tin]

 160

"Poids des Boulets"

1/4 32
1/2 40
3/4 46
1 51
2 64
3 73
4 80,5
5 87
6 92
8 102
10 110
12 117
14 123
16 129
18 134
20 139
22 143
24 147
27 153
30 158
33 164
36 168
40 174
48 185
55 194
60 199
64 204

"Calibre des Pieces"

1/4 34
1/2 43
3/4 49
1 53,5
2 67
3 77
4 84
5 90
6 96
8 106
10 115
12 121,5
14 128
16 134
18 139
20 144
22 148
24 153
27 159
30 164
33 170
36 175
40 181
48 192
55 201
60 206
64 212