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 |