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The wood is chipped and put into digesters large enough to hold twenty tons, and is steam-cooked together with bisulphite of magnesium or calcium for seven or eight hours. Another method used for cooking such woods as poplar and gum, is to boil the wood in caustic soda, which destroys everything except the cellulose.
So far as all the classicism then attainable was concerned, Shakespeare got it as cheap as Goethe did, who always bought it ready-made. For such purposes of mere aesthetic nourishment Goethe always milked other minds, if minds those ruminators and digesters of antiquity into asses' milk may be called.
The rags that are to be "cooked" are fed in to the "digesters" through the openings in the floor, and the great movable manhole plates are then put in place and closed, hermetically sealing the openings or mouths through which the boilers have been fed, these having first been charged with a mixed solution of lime and soda and with live hot steam in lieu of gastric juice as a digesting fluid and force.
"A bad blow," she muttered, "but I do not think he is ill. There is no fracture. When I nursed in the Alexander Hospital I learnt much about head wounds. Do not give him cognac if you value his life." Heritage was talking now and with strange tongues. Phrases like "lined Digesters" and "free sulphurous acid" came from his lips.
When sulphite wood pulp is to be prepared, the chips are conveyed from the chipper into hoppers in the upper part of the building. Here they are thrown into great upright iron boilers or digesters charged with lime-water and fed with the fumes of sulphur which is burned for the purpose in a furnace adjoining the building and which thus forms acid sulphide of lime.
The "digesters," as they are suggestively and appropriately termed, are huge revolving boilers, usually upright, which often have as great a diameter as eight feet, with a height of twenty-two feet and a digestive capacity of upward of five tons of rags each.
The journey of the rags over this endless belt or conveyor terminates in a receiving-room, in the floor of which there are several openings, and immediately below these the mouths of the "digesters," which are in a room beneath.
No Newton, by silent meditation, now discovers the system of the world by the falling of an apple; but some quite other than Newton stands in his Museum, his Scientic Institution, and behind whole batteries of retorts, digesters and galvanic piles imperatively 'interrogates nature' who, however, shows no haste to answer.
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