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