densing action than if the tubes were Of the hydrocarbons which unite to constitute flowing full of water. These tubes can easily be naphtha, three have been separated and examined. cleaned, and they may be plugged when the engine is These are benzole, C,, H,, toluol, C,, Hg and cumol, at work to… … Fig. 22. posed of equal parts of pure crystallizable acid and necessary pressure to the packing. The steam is ad- chloroform, be exactly applied to a clean and healthy mitted to the outside of the tubes by one branch con- skin, not deprived of its, epidermis, and if this pbial nection, and the…
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