DMM 34926

Museum: Deutsches Museum, Munich

Title: Sector by Lenoir

Inventory number: DMM 34926

Signature: "Lenoir a Paris"

Date: To be established. 

Material: Brass

Dimensions: Lenght of limb: 166 mm; width: 15 mm.

Description: See Schneider, 1970, p. 90.

Preliminary examination of the metallic scales: Planetary symbols on the metal scale, indicated a "Les Metaux". Engraving is much better quality than DMM 15991 and DMM 12656. Two other scales, each on a face, when the sector is opened at 180 degrees, on the border, "Poids des Boulets" (side of metallic scale) and "Calibre des Pieces", in rather small fonts (the "C" is about 2,5mm high).

ReferencesSchneider, Ivo: Der Proportionalzirkel: Ein universelles Analogrecheninstrument der Vergangenheit. Deutsches Museum: Abhandlungen und Berichte. 38. Jahrgang 1970, Heft 2. München, Düsseldorf 1970, p. 90.

Maurice, Daumas: Les instruments scientifiques aux XVIIe et XVIIIe siecle. Paris, 1953, p. 363 f.

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]

162,5

"Poids des Boulets"

1/4 32
1/2 41
3/4 46,5
1 51
2 64,5
3 74
4 81
5 87,5
6 93
7 98
8 107
10 110
12 117
14 123,5
16 129
18 134
20 139
22 143,5
24 148
27 153,5
30 159
33 164,5
36 169

"Calibre des Pieces"

1/4 33
1/2 42
3/4 48
1 53
2 66
3 71
4 83
5 90
6 96
7 100
8 105
10 113
12 120,5
14 128
16 134
18 139,5
20 144
22 149
24 153
27 159,5
30 165,5
33 171
36 177