Acfe sentence example
- The width of each of the portions aghc and acfe cut away from the lens was made slightly greater than the focal length of lens X tangent of sun's greatest diameter.
- Trans., 1 753, p. 156) was constructed by cutting from a complete lens abcd the equal portions aghc and acfe (fig.
- Savary also describes another form of heliometer, on the same principle, in which the segments aghc and acfe are utilized by cementing their edges gh and of together (fig.
- In the fine example of this instrument at the Cape Observatory the movable negative lenses consist of segments of the shape gach and acfe (fig.