202

OILS.

the seeds at first, but to triturate the cakes after they have been crushed in the press-Old dry seeds sometimes require to be sprinkled with a little water to make the oilcome more freely away ; but this practice requires great care.

The apparatus for heating the bruised seeds consists usually of cast-iron or coppe'pans, with stirrers moved by machinery. Figs. 101, 102, 103,.104, represent the heatirsby naked fire, as mounted in Messrs. Maudsley and Field's excellent seed crushingmills, on the wedge or Dutch plan.

Fig. 101 is an elevation, or side view of the fireplace of a'naked heater; fig. lOiis a plan, in the line UU of fig. 101. Fig. 103, is an elevation and section parallel tothe line VV of fig. 102. Fig. 104, is a plan of the furnace, taken above the grateof the fireplace.

A, fireplace shut at top by the cast-iron plate B ; called the fireplate.C, iron ring-pan, resting on the plate B, for holding the seeds ; which

E,fig. 103, the stirrer which prevents the seeds” from being burned by

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