Having selected the proper materials and arranged the mixing board and
runs, the next step is the actual process of mixing.
The proportions of materials and the nature of same for various types
of work have already been described on pages 11-13. In following
the mixing instructions here given, considerable assistance will be
obtained by referring to the illustrations with which instructions are
interspersed.
[Illustration]
[Illustration: Fig. 3.—Lifting off the Sand Measuring Box and Getting
Cement Ready.]
[Illustration]
[Illustration: Fig. 4.—Spreading the Cement Over the Sand.]