The admission of steam must be regulated with the greatest nicety, so as to maintain an equable temperature, 208° to 210° F., hot enough to act upon the albumen and yet not enough to cause ebullition or disturbance in the juice, and so prevent a proper separation of the cachazas.
In using these machines there is seldom any question of determining the weight to any great nicety, and rapid action is generally of high importance.
If each distributing flue is connected by means of a mixing valve with a cold-air flue, the warmth of the incoming air can be regulated nicely.
Dietaries are everywhere the same; they are calculated with great nicety according to the time of durance, and afford variety and ample nutrition without running into excess.
But cylinder presses are now made so truly turned, and geared to such nicety, that this idea no longer prevails.