164 To tale Allitudes and Diſtancess. 5ſtance of che ſtations meaſured from E to M, be 51. 60 feer. Thisnumber, with three ciphers added, is 516000. Which divided by,583(che former Difference) gives in the Quotient 88. 50 or 88.3 feetfor the Height G F. And if G H be z foot more: The whole HeighthHE will be 93 4 feet.. 5 51 Note, That in theſe Menſurations, che point G is ſuppoſed to

i to ſtand in the ſame Level with the corner of your QuadrantD and L. So that G H, D E, L Mare all of one Heighth. Andnote too, that the two ſtationary points are E and M, namely,thoſe which are juſt under the corners D and L.

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