MPS A I 126
Museum: Mathematisch-Physikalischer Salon, Online Collection
Title: French Sector/Proportional compass
Inventory number: MPS A I 126
Place, Date: Paris 1715
Material and technique: Brass, engraved
Dimensions: Length = 14,8 cm; width = 3,2 cm; thickness = 0,45 cm
Manufactured by: Maulevaut, Jean
Notes: Planetary symbols on the metal scale. 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"
Measurements of Scales (in mm)
Gold (Sun) |
99,5 |
Lead (Saturn) |
117,5 |
Silver (Moon) |
122 |
Copper (Venus) |
127,5 |
Iron (Mars) |
132,5 |
Tin (Jupiter) |
136 |
"Calibre des pieces"
1/4 |
33,00 |
1/2 |
42,00 |
3/4 |
48,00 |
1 |
53,00 |
2 |
67,00 |
3 |
76,00 |
4 |
84,00 |
5 |
90,00 |
6 |
96,00 |
7 |
100,00 |
8 |
106,00 |
10 |
113,00 |
12 |
125,00 |
15 |
130,00 |
18 |
138,00 |
20 |
142,50 |
24 |
151,00 |
27 |
157,00 |
30 |
163,00 |
33 |
168,00 |
36 |
173,00 |
40 |
179,00 |
45 |
186,50 |
50 |
193,00 |
55 |
199,00 |
60 |
205,00 |
"poids des boulets"
1/4 |
32,00 |
1/2 |
40,00 |
3/4 |
46,00 |
1 |
51,00 |
2 |
64,00 |
3 |
73,00 |
4 |
81,00 |
5 |
87,00 |
6 |
92,00 |
7 |
97,00 |
8 |
102,00 |
10 |
109,50 |
12 |
116,50 |
15 |
125,00 |
18 |
134,00 |
20 |
138,00 |
24 |
147,00 |
27 |
153,00 |
30 |
158,50 |
33 |
163,50 |
36 |
168,00 |
40 |
175,00 |
45 |
181,50 |
50 |
188,00 |
55 |
194,00 |
60 |
199,00 |