Thomas Hooe his Book, August 10th 1791 [...]

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A Treatise of Practical Surveying: Which is Demonstrated From its First Principles Wherein Every Thing That is Useful and Curious in that Art, is Fully Considered and Explained, 5th edition

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1789

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Front Free Endpaper

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Thomas Hooe his Book, August 10th 1791

Rules for finding the angle contained between the courses.

1st. One meridian and one paralels the difference between both courses is the contained angle,

2nd. Two meridians and one paralel; the Sum of both Courses taken from 100 deg [?]eares the contained angle.

3rd One meridian and two paralels; the Sum of both courses is the cont. angle.

4th Two meridians and two paralels; the lesser Course and supplement of the great or is the contained angle.