...The colonization movement wasanother form of these efforts; it was inadequately conceived,and not altogether sincere, but it had a sound, although inthis case impracticable, economic basis... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
... Having found it impracticable to open up a carriage-path to the west, it became a question as to which part of the east coast we should direct our steps...
David Livingstone 「Missionary Travels and Researches in South Africa」
...But this latter idea I subsequently found impracticable, as it would have interfered with the proper season for my projected journey up the White Nile in search of the sources...
Samuel White Baker 「In the Heart of Africa」
...
"The tahr is very tenacious of life, and, even when mortally wounded,he will frequently make his escape into utterly impracticable ground...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...I decided, therefore, to use such extracts in these investigations,since the small sizes of the birds to be tested made it impracticable toobtain enough whole sera...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The achievementsounds well in theory, but, like much else of popularWestern lore is somewhat impracticable when fairlytested...
W. E. Webb 「Buffalo Land」
...Sheep, in such cases, should be housed; or,where this is impracticable, driven into dense forests...
Robert Jennings 「Sheep, Swine, and Poultry」
...Where such burning is impracticable the surface soil ofthe yard and surroundings should be removed to a depth of 5 or 6 inches andthen placed in a heap and thoroughly mixed with air-slaked lime...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This method, however, is in many instances impracticable, as fewcattle owners can afford to do it, and the only means left for the protectionof the animals is vaccination...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...But this course is impracticable on the present occasion, so we boldly and ruthlessly assault the tree with an ax we have procured...
John Burroughs 「Birds and Bees, Sharp Eyes and, Other Papers」
...With creatures so madly in love with the light precise and prolongedexperimentation is impracticable the moment the observer requiresartificial light...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...Exposed to this or that habitual impediment in the exercise of itscalling, the animal is always equipped accordingly; otherwise itsprofession would be impracticable...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
... The experiment with the magnet is impracticable...
J. Henri Fabre Alexander Teixeira de Mattos 「The Mason-bees」
... This substitution is impracticable with the majority of the Tachytes, who reach the threshold of their dwelling in a single flight and at once vanish underground with their game...
J. Henri Fabre 「More Hunting Wasps」
... The "almost" is impracticable when the future of the race is at stake...
J. Henri Fabre 「More Hunting Wasps」
...Never was there a more impracticable theory broached...
Montagu Browne 「Practical Taxidermy」
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conquistador management forgings
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