This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ... CHAPTER IX. CLARIFYING AND UTILISATION OF WASTE FATS, OILS, TANK BOTTOMS, DRAININGS OF BARRELS AND DRUMS, PICKINGS-UP, DREGS, Etc. The great object in any oil works should be to utilise everything. Nothing is more annoying than to see accumulations. In some works where the writer has been the quantity has been enormous. All that is required are four small pans fitted with a steam coil, viz.: --No. 1 Animal and vegetable fats, oils, etc. No. 2 Pale mineral oil. No. 3 Dark mineral oil. No. 4 Linseed, boiled oils and varnish. When full, heat up to 170 F., well agitating. Then sprinkle in dry a mixture of 6 Ib. powdered alum, 1 cream tartar, to every cwt. (without crutching), and allow to settle for twelve hours, when same can be skimmed off bright and ready for further use. Any water lying at bottom of pan should now be drawn or pumped off, and the dregs passed CLARIFYING AND UTILISATION OF WASTE FATS, ETC. 77 through a fine sieve or muslin, and this can be used up either in a grease or in conjunction with a black oil for chains, etc. By the adoption of such a system everything is periodically utilised, and the massing of ullages and waste matter entirely avoided. CHAPTER X. THE FIXING AND CLEANING OP OIL TANKS, Etc. Ninety per cent. of the complaints from customers arise from the oil having been either stored in dirty tanks or filled into dirty barrels or drums, through which carelessness much annoyance is caused to customers, resulting sometimes in losing them, besides the allowance or return that has generally to be made in such cases. Fixing And Filling Of Tanks. In fixing these into position it is essential to see that they slope well, so that the bottoms can be drawn off periodically from the lower tap, as there is always a deposit..