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13. If a man six feet high travel round the earth, how much greater will be the circumference described by the top of his head, than by his feet?

Answ. 37.69 feet.

N. B. The required difference is equal to the circumference of a circle of 6 feet radius, let the magnitude of the earth be what it may.

14. Required the dimensions of a parallelogram containing 200 acres, which is 40 perches longer than wide ?

Answ. 200 perches by 160.

15. What difference is there between a lot 28 perches long by 20 broad, and two others each of half those dimensions ?

Answ. 1A. 3R.

FINIS.

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DIFFERENCE

OF

LATITUDE AND DEPARTURE;

LOGARITHMS,

FROM 1 to 10,000;

AND

ARTIFICIAL SINES, TANGENTS, AND

SECANTS.

BALTIMORE:

PUBLISHED BY FIELDING LUCAS, JUN.

T.H. Palmer, Printer, Philadelphia.

1819.

[blocks in formation]
[blocks in formation]

Dep.

Lat.

Dep.

Lat.

Dep.

0.01 0.03 0.04 0.05 0.07 0.08 0.09 0.10 0.12 0.13

1 2 3 4 5 6

9 10

0.14 11 0.16 12 0.17 13 0.18

14 0.20 15 0.21 16 0.22 17 0.24 18 0.25 19 0.26 20

0.27 | 21 0.29 22 0.30 23 0.31 24 0.33 | 25 0.34 26 0.35 27 0.37 28 0.38 29 0.39 30

0.41 0.42 0.43 0.45 0.46 0.47 0.48 0.50 0.51 0.52

31 32 33 34 35 36 37 38 39 40

0.54 41 0.55 42 0.56 43 0.58 44 0.59 45 0.60

46 0.62 47 0.63 48 0.64

49 0.65 50

Lat.

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