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The magnetic dip is always measured in this work, according to the centesimal division, if the contrary be not expressly mentioned.
One flasco contains 70 or 80 cubic inches, Paris measure.
112 English pounds = 105 French pounds; and 160 Spanish pounds = 93 French pounds.
An arpent des eaux et forets, or legal acre of France, of which 1. 95 = 1 hectare. It is about 1 1/4 acre English.
A tablon, equal to 1849 square toises, contains nearly an acre and one-fifth: a legal acre has 1344 square toises, and 1.95 legal acre is equal one hectare.
For the sake of accuracy, the French Measures, as given by the
Author, and the indications of the Centigrade Thermometer, are
retained in the translation. The following tables may, therefore,
be found useful.
TABLE OF LINEAR MEASURE.
1 toise = 6 feet 4.73 inches.
1 foot = 12.78 inches.
1 metre = 3 feet 3.37 inches.
(Transcriber's Note: The 'toise' was introduced by Charlemagne
in 790; it originally represented the distance between the
fingertips of a man with outstretched arms, and is thus the same
as the British 'fathom'. During the founding of the Metric System,
less than 20 years before the date of this work, the 'toise' was
assigned a value of 1.949 meters, or a little over two yards. The
'foot'; actually the 'French foot', or 'pied', is defined as
1/6 of a 'toise', and is a little over an English foot.)
CENTIGRADE THERMOMETER REDUCED TO FAHRENHEIT'S SCALE.
Cent. Fahr. Cent. Fahr. Cent. Fahr. Cent. Fahr. 100 212 65 149 30 86 -5 23 99 210.2 64 147.2 29 84.2 -6 21.2 98 208.4 63 145.4 28 82.4 -7 19.4 97 206.6 62 143.6 27 80.6 -8 17.6 96 204.8 61 141.8 26 78.8 -9 15.8 95 203 60 140 25 77 -10 14 94 201.2 59 138.2 24 75.2 -11 12.2 93 199.4 58 136.4 23 73.4 -12 10.4 92 197.6 57 134.6 22 71.6 -13 8.6 91 195.8 56 132.8 21 69.8 -14 6.8 90 194 55 131 20 68 -15 5 89 192.2 54 129.2 19 66.2 -16 3.2 88 190.4 53 127.4 18 64.4 -17 1.4 87 188.6 52 125.6 17 62.6 -18 -0.4 86 186.8 51 123.8 16 60.8 -19 -2.2 85 185 50 122 15 59 -20 -4 84 183.2 49 120.2 14 57.2 -21 -5.8 83 181.4 48 118.4 13 55.4 -22 -7.6 82 179.6 47 116.6 12 53.6 -23 -9.4 81 177.8 46 114.8 11 51.8 -24 -11.2 80 176 45 113 10 50 -25 -13 79 174.2 44 111.2 9 48.2 -26 -14.8 78 172.4 43 109.4 8 46.4 -27 -16.6 77 170.6 42 107.6 7 44.6 -28 -18.4 76 168.8 41 105.8 6 42.8 -29 -20.2 75 167 40 104 5 41 -30 -22 74 165.2 39 102.2 4 39.2 -31 -23.8 73 163.4 38 100.4 3 37.4 -32 -25.6 72 161.6 37 98.6 2 35.6 -33 -27.4 71 159.8 36 96.8 1 33.8 -34 -29.2 70 158 35 95 0 32 -35 -31 69 156.2 34 93.2 -1 30.2 -36 -32.8 68 154.4 33 91.4 -2 28.4 -37 -34.6 67 152.6 32 89.6 -3 26.6 -38 -36.4 66 150.8 31 87.8 -4 24.8 -39 -38.2
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