They can be distinguished by their insolubility in cupramfnonia, which dissolves cellulose, and by their behaviour towards stains, some of which stain pectic substances but not cellulose. [Please select]
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_--At various times salts of metals other than mercury have been added to soap, but, owing to their insolubility in water, their efficiency as medicaments is very trifling or nil. [Please select]
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In the second place the assumption is useless; it explains nothing, but confuses the problems of natural science to the point of insolubility. [Please select]
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All the difficulty and seeming insolubility of the question of the freedom of man results from those who tried to solve the question imagining man as stationary in his relation to the truth. [Please select]
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