If the stack is flat and as near an ellipse as the eye can judge,
laying out and keeping the stack properly balanced will be very easy.
Drive alternate loads on opposite sides of the stack: this will help to
keep the stack properly balanced. If the eye detects a place that seems
to be lower than the general level, it will be found that it was caused
by laying out more there than at other points; to remedy this defect,
draw in the next outside course at the low point six, eight or ten
inches, according to the depression. The greater the depression, the
more it should be drawn in, and the next inside course at the low point
should be shoved out nearly to the buts of the outside course, then
continue to build as though nothing had happened. If a high place should
be observed, the next outside course should be laid farther out, and
inside course at this point drawn well in. Glance frequently over the
stack and see if the outside presents the appearance of an ellipse, and
keep a sharp lookout for high and low spots. If the middle is too full,
the outside will slip out, and an undesirable job of propping will
begin. Put in two thirds of what is intended for the stack before
commencing to draw in. Don't let a stack stand over night at this stage
if it can be avoided, but put on the next two loads as quickly as
possible, for the outside of the stack will settle rapidly.