... The first business of political economy, after fixing its definitions, was the solution of this problem; now, not only has it not been solved, but it has been declared insoluble... 
P. J. Proudhon 「What is Property?」
...A less common constituent of urinary calculi is the insoluble oxalate oflime...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...My Necrophori, some sooner, somelater, abandon the insoluble mechanical problem: to push, ever solittle, the movable support and so to unhook the coveted carcase...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
... I hasten to abandon these insoluble problems in order to attack the question of provisions from another point of view...
J. Henri Fabre 「More Hunting Wasps」
...This consequence,which to me seems immediate, renders the problem insoluble...
Francis Huber Anonymous 「New observations on the natural history of bees」
...On all sides it was regarded as an insoluble enigma...
Ernst Haeckel 「The Evolution of Man」
... may be defined as colours in a solid or insoluble state,prepared for the artists' use...
George Field 「Field's Chromatography」
...The metallic compounds formed by the combination of persulphomolybdicacid with a base are pulverulent, in many cases of a red colour, and forthe most part insoluble in water...
George Field 「Field's Chromatography」
...This colour is insoluble in water, and it has theobjection of remaining partially suspended for an almost indefinitetime, colouring the liquid light red...
George Field 「Field's Chromatography」
...When thus prepared it is insoluble in water, and would sofar be adapted for a pigment...
George Field 「Field's Chromatography」
...It may, indeed, be renderedcomparatively insoluble in water by ignition; but the anhydrous oxide soobtained is nearly black, and as a colour worthless...
George Field 「Field's Chromatography」
...He thought this would make a great puzzle, truly an insoluble conundrum,to take back to bewilder his Martian friends...
Dr. D.M. Brooks 「The Necessity of Atheism」
...We are here,of course, faced with a riddle, which is all the more tantalising fromits appearing for ever insoluble to men, chained as they are to theearth...
Cecil G. Dolmage 「Astronomy of To-day」
...Closely connected with the problem of the extent of the universe isanother which appears, for us, to be insoluble because it brings usface to face with infinity itself...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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