DMM 68220T015
Museum: Deutsches Museum, Munich
Title: Sector by Pierre Le Maire
Inventory number: DMM 68220T015
Signature: "Le Maire fils AParis"
Date: Middle of the 18. century
Material: Brass
Dimensions: Lenght of limb: 168 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 "Calibres des pieces" (side of the metallic line) and "Poids des boulets" (other side). Good manufacturing.
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.
Measurements of Scales (in mm)
"Les Metaux"
☉ [Sun, Gold] |
117 | |
♄ [Saturn, Lead] |
138 | |
☽ [Moon, Silver] |
143 | |
♀ [Venus, Copper] |
149,5 | |
♂ [Mars, Iron] |
155 | |
♃ [Jupiter, Tin] |
160 |
"Poids des boulets"
1/4 | 32,5 |
1/2 | 40,5 |
3/4 | 46,5 |
1 | 51 |
2 | 64 |
3 | 73,5 |
4 | 80,5 |
5 | 87 |
6 | 92,5 |
8 | 102 |
10 | 109,5 |
12 | 116 |
14 | 122 |
16 | 128 |
18 | 133 |
20 | 138 |
22 | 142 |
24 | 146 |
27 | 152 |
30 | 157 |
33 | 163 |
36 | 167,5 |
40 | 173 |
48 | 184,5 |
55 | 193 |
60 | 198,5 |
64 | 203 |
"Calibres des pieces"
1/4 | 34 |
1/2 | 43 |
3/4 | 49 |
1 | 54 |
2 | 67 |
3 | 77 |
4 | 84 |
5 | 90 |
6 | 96 |
8 | 106 |
10 | 114 |
12 | 121 |
14 | 127 |
16 | 133 |
18 | 138,5 |
20 | 143 |
22 | 148 |
24 | 152 |
27 | 158 |
30 | 164 |
33 | 169 |
36 | 174 |
40 | 180 |
48 | 191,5 |
55 | 200 |
60 | 205,5 |
64 | 211 |