Sacred Texts Age of Reason Index

II. Linear Perspective Index

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Begin from the line *m f* with the eye below; then go up and do the
same with the line *n f*, then with the eye above and close to the 2
gauges on the ground look at *m n*; then as *c m* is to *m n* so
will *n m* be to *n s*.

If *a n* goes 3 times into *f b, m p* will do the same into *p g*.
Then go backwards so far as that *c d* goes twice into *a n* and *p
g* will be equal to *g h*. And *m p* will go into *h p* as often as
*d c* into *o p*.

60:49 : The first three lines are unfortunately very obscure.