Porous

Examples

• This process is best adapted to what are known as free milling or porous ores, where the gold is free and very fine and is attracted readily by mercury. William Henry Doolittle. Inventions in the Century.
• A porous tube, _b_, holds a rod of amalgamated zinc, to the top of which a binding-screw is soldered. Frederick C. Bakewell. Great Facts.
• For words, theories, symbols, slogans, abstractions of all kinds are nothing but the porous vessels into which life flows, is contained for a time, and then passes through. Walter Lippmann. A Preface to Politics.
• In filtration, the water is forced through porcelain or other porous substances which allow the passage of water, but which hold back the minute foreign particles suspended in the water. Bertha M. Clark. General Science.
• Some kinds were too soft and porous, others were liable to split easily. Rupert S. Holland. Historic Inventions.
• The porous jar is then filled to the same height as the copper solution in the jar with diluted sulphuric acid, in the proportions of one of acid to twenty of water. Frederick C. Bakewell. Great Facts.
• The agglomerated product must be porous so as to afford access of the furnace-reducing gases to the ore. Frank Lewis Dyer. Edison, His Life and Inventions.
• If dough is left standing in a warm place a number of hours, it swells up with gas and becomes porous, and when baked, is less compact and hard than the savage bread. Bertha M. Clark. General Science.
• It consists of impressing oil pictures on a bat of glue and then pressing the bat on to the porous unbaked clay or porcelain which transferred the colours. William Henry Doolittle. Inventions in the Century.
• While still warm dip porous paper (cut into small squares) in the solution and dry them. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
• Redwood does not contain pitch, the inflammable element in wood, and, in addition, it is extremely porous, quickly absorbing water. Various. The Wonder Book of Knowledge.
• In the illustration, which shows a slightly modified form, a cruciform rod of zinc within a porous cup is surrounded by a copper cell, the whole being enclosed within a glass jar. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• This can be done by mixing a little soda in the flour, because the heat of the oven causes the soda to give off bubbles of gas, and these in expanding make the heavy mass slightly porous. Bertha M. Clark. General Science.
• Butter, cheese, and other foods sensitive to heat are placed in porous vessels wrapped in wet cloths. Bertha M. Clark. General Science.
• The cement commonly used for fastening the tops on kerosene lamps is plaster of Paris, which is porous, quickly penetrated by the kerosene, and readily destroyed. William K. David. Secrets of Wise Men, Chemists and Great Physicians.
• Several methods of making porous filaments. Frank Lewis Dyer. Edison, His Life and Inventions.
• When the article comes out of the plating bath the silver deposited is in a comparatively porous and fluffy state. Various. The Wonder Book of Knowledge.
• Charcoal is porous and absorbs foul gases, and thus keeps the region surrounding sewers sweet and clean and free of odor. Bertha M. Clark. General Science.

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