DMM 63905

Museum: Deutsches Museum, Munich

Title: Sector by Pierre Le Maire

Inventory number: DMM 63905

Signature: "P. le Maire AP[ar]is" big curl on final "s" and [ar] is illegible due to use

Date: Middle of the 18. century

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 et Diametres des Boulets" and "Calibres des Pieces". Note: "Calibre des Pieces" is on the same side of the metallic scale (see DMM 18760)

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. 340f.

Measurements of Scales (in mm)

"Les Metaux"

☉ [Sun, Gold]

 119

♄ [Saturn, Lead]

 140

☽ [Moon, Silver]

 145,5

♀ [Venus, Copper]

 152

♂ [Mars, Iron]

 158

♃ [Jupiter, Tin]

 163

"Calibres des Pieces"

1/2 42
1 53
2 66,5
3 76
4 83
5 90
6 95
8 104
10 112
12 119
16 131
20 141,5
24 150,5
30 162
33 167,5
40 179
48 190
55 198
60 204
64 208

"Poids et Diametres des Boulets"

1/2 40
1  50
2 63
3 72
4 80
5 86
6 91
8 100
10 108
12 115
16 126
20 136
24 145
30 156
33 161
40 172
48 182
55 191
60 196,5
64 201