...It is impossible for me to impress upon the readers of this volume with sufficient force and clearness the splendid success that is easily attainable in encouraging the return of the birds... 
William T. Hornaday 「Our Vanishing Wild Life」
...These people are hard workers; and when they mark out definitecourses and attainable goals, they know how to get results...
William T. Hornaday 「Our Vanishing Wild Life」
...So it is apparent that a local collectionshould be attainable by any enthusiastic student andthe very fact that the number of species is limited addsinterest and satisfaction to the pursuit...
Clarence M. Weed 「Butterflies Worth Knowing」
...Thevariations in size of the wild ostrich appear to indicate that thisinteresting result may be attainable...
Nathaniel Southgate Shaler 「Domesticated Animals」
...This doubting implies an assumption on their part that the knowledge they possess is the highest attainable, that their minds are, in fact, complete in themselves...
Gordon Stables 「The Domestic Cat」
...This effect isonly attainable by great ease of outline and variety of color;peculiarities which, as will be presently seen, the Westmoreland cottagepossesses in a supereminent degree...
John Ruskin 「The Poetry of Architecture」
...From them we may be sure thatthe efficiency of the nine-inch mirror used was not sensibly less thanthat of the highest theoretically attainable excellence...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
...In this respect we may be sure thatnothing attainable by human ingenuity will be found wanting...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...Discharge this enormous bullet with a velocity of about 3,000feet per second, which is two or three times as great as the velocityactually attainable in modern artillery...
Robert Stawell Ball 「The Story of the Heavens」
...This element,even if attainable, could only be the result of a protracted series ofobservations of a nature which will be explained later on when we cometo speak of the distances of the stars...
Robert Stawell Ball 「The Story of the Heavens」
...Our first attempt to examine this question must lie in an appeal to thefacts which are attainable...
Robert Stawell Ball 「The Story of the Heavens」
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