..., assiduity, assiduousattention, zeal... 
Gustavo Adolfo Becquer 「Legends, Tales and Poems」
...What he wants in dash and ranging propensities, he makes up for inunwearied assiduity, extreme carefulness, and extraordinary scentingpowers...
Dinks, Mayhew, and Hutchinson 「The Dog」
...Themocking-birds and some other species will, with great assiduity,endeavor to copy any sound which they happen to hear...
Nathaniel Southgate Shaler 「Domesticated Animals」
...From the assiduity with which they resort to arable landand follow the plough, they have been called Sea Crows...
Rev. C. A. Johns 「British Birds in their Haunts」
...It would therefore beproper to watch them with the utmost assiduity, from the instant ofproduction until the period of exclusion...
Francis Huber Anonymous 「New observations on the natural history of bees」
...A good connoisseur in prints is morethan half way advanced in the art of judging pictures; and he who aimsat this must study engravings with unremitting assiduity...
Luigi Antonio Lanzi Thomas Roscoe 「The History of Painting in Italy, Vol. 1 (of 6)」
...But he soon afterwards adopted a more elevated style, and devotedhimself with such obstinate assiduity to study, that he shaved his headin order to prevent himself from going out of the house...
Luigi Antonio Lanzi Thomas Roscoe 「The History of Painting in Italy, Vol. 2 (of 6)」
...But it was by the skill and assiduity with which he carried outhis numerous and important observations that he has earned for himself aposition of the most honourable distinction among astronomers...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...For the assiduity with which the measurements on the diameter of the Georgium Sidus, and observations of other planets, double stars, etc...
Edward Singleton Holden 「Sir William Herschel: His Life and Works」
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