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CASTOR-OIL INDUSTRY. 15 
In figure 5 the press at the right shows the overhead plunger 
- rolled back and the cage ready to receive the crushed material; the 
press at the left shows the plunger in position to receive the pressure. 
During the pressing operation metal shields are placed around the 
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iia. 5.—A cage press inclosed in a shield (at left) to prevent the squirting of the oil. Over- 
head plunger rolled back to permit filling the cage (at right). 
retaining cages for the purpose of preventing the oil from squirting 
and to conduct it to the pan below. 
Figure 6 shows an ordinary plate press which has been converted 
into a cage press by removing the plates and substituting a small 
specially constructed cage to fit within the press frame, holding about 
1 bushel to the charge. A frame has been added in front of the cage, 
on which to slide out the latter for filling and dumping. 
