For all straight lines which meet at any point on the horizon are perspectively parallel to each other, just as two geometrical parallels crossing two others at any angle, as at Fig.
RULE 10 Horizontals in the same plane which are drawn to the same point on the horizon are perspectively parallel to each other.
You have often heard, and know from personal experience, that remote objects appear perspectively dwarfed.
When you see it bent back you see it perspectively distorted.
These results may be put together as follows: Given any two assemblages of points, rays, or planes, perspectively related to each other, four harmonic elements of one must correspond to four elements of the other which are likewise harmonic.
If, now, two forms are perspectively related to a third, any four harmonic elements of one must correspond to four harmonic elements in the other.
In particular, the points on a tangent are said to be perspectively related to the tangents of a conic when each point lies on the tangent which corresponds to it.
An entirely similar discussion shows that If in two projective pencils the line joining their centers is a self-corresponding ray, then the two pencils are perspectively related.
If the two point-rows areperspectively related, then their common point is evidently a self-corresponding point.
Sketching in perspective is a valuable auxiliary in designing roughly the masses of a building; but some more accurate method is required in perspectively setting out the heights of stories, entablatures, parapets, towers, and other features.
Mr. Pennethorne says that the Greek entablature is perspectively proportioned and arranged to suit the given points of sight thus: The apparent height of entablature is measured in seconds upon the arc of a great circle.
Their eyrie slipped perspectively astern, sank lower and lower, and suddenly was lost against the background of the coast.
Then the bow was poled off, the current took us in its arms and swung us out into the stream, and the crowd on the shingle dropped perspectively astern.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "perspectively" in a variety of sentences. We hope that you will now be able to make sentences using this word.
