Manual of the Enumeration / A Text Book on the Sciences of the Enumeration, Book one

by C. J. Coffman

to another when they are one-fourth of the way around the Zodiac from each other, or 90 degrees of the circle, because that is the arc that forms a square. This would be three signs of the Zodiac apart or 90 degrees. The SQUARE

is considered an adverse or bad aspect.

—[d]—A planet is TRINE

to another when they are one-third of the way around the Zodiac from each other, or 120 degrees apart. This would be four signs of the Zodiac. The TRINE

is considered a good aspect.

ASPECTS OF PLANETS