...It is a vivid portrayal of the slave power's insidious encroachments, and of its monopolized guidance of the Government... 
William Still 「The Underground Railroad」
..." Here the matter is made very plain, from comparing an evil,the progress of which is insidious, with the injurious consequences,which the most unobserving can easily trace to a parallel neglect...
Ambrose Blacklock 「A Treatise on Sheep:」
...—The beginning of the disease usually passes unnoticed,inasmuch as it is very slow and insidious and rarely accompanied with fever...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...It is a most insidious and difficult foe to overcome...
Alpheus Spring Packard 「Our Common Insects」
...He isas tall as the lion, but not quite so powerful; he is, however, moreagile, more graceful, and more insidious...
R. Lee 「Anecdotes of the Habits and Instinct of Animals」
...They have still more deadly foesin parasites, some of which attack the fully developed locust, but thegreater number adopt the more insidious method of attacking the eggs...
Various 「Argentina From A British Point Of View」
...But his last shred of reserve strength had nearly been sapped now bythe insidious rays of that malevolent green moon...
Various 「Astounding Stories, May, 1931」
...We all remember the campaign ofpropaganda that was forced into the very fibre of every country, toweaken with its insidious dry-rot the safe foundations of our verycivilization...
Various 「Astounding Stories, June, 1931」
...More insidious and devastating than any drug everproduced on Earth, it had wrought frightful havoc among many solarraces...
Various 「Astounding Stories, June, 1931」
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