ET one Place be in 50. co de. the other in 55. co de. d North Latitude: And 6. 50 deg. difference in Longitude: Then the Middle Latitude between 50. co deg. and 55.00 deg. is 52. 50 de. And its Complement 37. 50 deg. Then

(1) For the Rumb: The Proportion is,

TH

HE Latitudes of two Places, A and C, and theRumb, B AC, (or Course) between them Given: to Find,

(1) Their Distance A C.

(2) Their Difference of Longitude, B C.

For the Distance it may be found as in the former Problem.

4

PROB. HI,

HE Dißance AC, 361.06 M. And both the Latitudes Given,
To find the Rumb..

THE

To the Sine of 56.19 deg.

Meridian.

2.557579

12.477121

10.

9.919542

Whole Complement 33.81 deg. is the Rumb BA C. from the

PROB. IV.

HAvi

Aving one Latitude, the Rumb, and Distance upon the Rumb to find the Difference of Latitude.

10.

9.919542

2.557579

x2.477121

Aving the Rumb and both Latitudes given, to find the Diffe rence of Longitude.

HA

The Differences in thefe Three Ways of Sailing: In this

Example:

1