REINFORCING CONCRETE; CEMENT TOOLS 139 



a) For screening aggregate a moulder's riddle for 

 small work, or a screen, as shown in Fig. 138. 



6) For washing aggregate a trough in which dirty 

 aggregate can be freed from clay. 



FIG. 145-a. Mixing concrete. Measuring boxes and other equipment. 



c) For mixing and placing a platform, as shown in 



Fig. 142; shovel, spade, hoe, tamper, striking 

 board and wheelbarrow (Figs. 142, 145 and 147). 



d) For measuring ingredients a measuring box, as 



shown in Fig. 145-a. 



e) For finishing trowel, edger, groover, hand float, 



etc. (Fig. 145). 



f) Water container a barrel or, for large construc- 



tion, a water tank, to which is attached a hose. 

 Tools for wood construction carpenter's square, 



hammer, saws (rip and crosscut). 



Note: To these tools there may be added a. mixer, either hand or 

 power, depending upon the extent of the work to be undertaken. 



