STATE GEOLOGIST. | 945 
Fig. 150.—Interior Structure of Dykema Block. 
Fig. 150a—The Hayden Machine. 
The Hayden Machine—The Hayden machine, manufactured in 
Columbus, Ohio, is an automatic block machine in which the blocks are 
made face down, with the face in a horizontal position. This enables 
the operator to easily give a veneer facing of rich mortar to the block or 
to make the face of colored mortar in imitation of natural building 
stones. The machine is very compact and turns out blocks with corners 
and edges sharp and true. It automatically releases the block from the 
mold, delivering it upon a base plate to a support in front of the machine, 
ready to be carried away. The machine will make blocks 8 to 16 inches 
thick and 8 to 32 inches long. ~ 3 
Figure 150a illustrates the original Hayden machine. Experience has 
shown them that this machine is set too high and is not rigid enough. In 
the later machines now coming from their shops, they are reducing the 
height of the frame and making it much heavier. 
