DOI Page / Citation link:
https://doi.org/10.11588/diglit.42851#0109
45
has been my object so to vary this elementary part of my design, that it shall not be-
come tedious or disgusting. It has been my aim to lead you on step by step, in the
acquirement of every branch of drawing, so that in the end you may be able to apply
the various parts to the formation of the whole. For this reason I have apparently not
pursued any one branch to its conclusion, but have returned to it at such intervals as
your progress in the art has required. You began with making lines, and applied them
to the formation of simple structures ; you found that they were formed so that the lines
of the upper parts of buildings seemed to slant downwards, and those of the lower parts
upwards, and you naturally inquired the cause; hence your introduction to per-
spective. The outlines of trees introduced, led on to an explanation of the rules by
which they are formed, and we have now arrived at that point when it is necessary
that you should understand not only how to put any figures on the plain in perspec-
tive, but also elevated forms of every kind; and I have the pleasure to inform you, that
I shall have no further occasion to refer to perspective diagrams after the present series.
In Plate XXVIX*. you will observe the line which is perpendicular to the base line,
marked b c; this line is called the line of elevation, and on this line is measured every
object that is raised above the ground plain. In the example before us, I wish to put
a wall with a door-way in perspective; the wall is twenty feet long, and eighteen feet
has been my object so to vary this elementary part of my design, that it shall not be-
come tedious or disgusting. It has been my aim to lead you on step by step, in the
acquirement of every branch of drawing, so that in the end you may be able to apply
the various parts to the formation of the whole. For this reason I have apparently not
pursued any one branch to its conclusion, but have returned to it at such intervals as
your progress in the art has required. You began with making lines, and applied them
to the formation of simple structures ; you found that they were formed so that the lines
of the upper parts of buildings seemed to slant downwards, and those of the lower parts
upwards, and you naturally inquired the cause; hence your introduction to per-
spective. The outlines of trees introduced, led on to an explanation of the rules by
which they are formed, and we have now arrived at that point when it is necessary
that you should understand not only how to put any figures on the plain in perspec-
tive, but also elevated forms of every kind; and I have the pleasure to inform you, that
I shall have no further occasion to refer to perspective diagrams after the present series.
In Plate XXVIX*. you will observe the line which is perpendicular to the base line,
marked b c; this line is called the line of elevation, and on this line is measured every
object that is raised above the ground plain. In the example before us, I wish to put
a wall with a door-way in perspective; the wall is twenty feet long, and eighteen feet