... if one can use such an expression about a bird; that he is all the time experimenting, trying to get a new phrase, a new combination of the notes he knows and new notes... 
W. H. Hudson 「Birds in Town and Village」
...We can only listen to our birds, and begin experimenting with those already possessed of shapely notes and voices of good quality...
W. H. Hudson 「Birds in Town and Village」
...He is always experimenting,and will change his anvil for anotheras soon as he discovers one of superior resonance...
Fannie Hardy Eckstorm 「The Woodpeckers」
...Usually there are more cocks than hens in a given lot of squabs and itis easier to give a hen which lays infertile eggs a new mate and sellthe cock without experimenting further...
Carl Dare 「Profitable Squab Breeding」
...Reader, do not smile: the future observer is already practicing and experimenting...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
... I have been experimenting all along with big Volucella grubs, colored with the dirty red which comes with age...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
... In the following year, 1881, I began experimenting again, but in a different way...
J. Henri Fabre Alexander Teixeira de Mattos 「The Mason-bees」
... The Darwinian school will reply that they were hesitating, essaying, experimenting...
J. Henri Fabre 「More Hunting Wasps」
...Clemmens, an American naturalist, has been lately experimenting on the antennæ of some large American moths, for the purpose of gaining some information as to their function...
W. S. Coleman 「British Butterfiles」
...One important point has been completely left out of sight and ignored inall this experimenting on animals...
A. Mueller 「On Snake-Poison: its Action and its Antidote」
...Instead of research being pushed on diligently in theonly direction that promised any chance of success, it was cut short bythe baneful method of experimenting on animals...
A. Mueller 「On Snake-Poison: its Action and its Antidote」
...For those who do not care to go to the expense of experimenting with large plates, I would suggest that good contact positives be first made and from these negatives on bromide paper, Standard A, soft...
John A. Tennant 「Bromide Printing and Enlarging」
...eventeen years of experimenting on a rocket designed by Prof...
Various 「Astounding Stories, March, 1931」
...In the yard beyond the hangman was experimenting with the trap...
Various 「Astounding Stories of Super-Science, October, 1930」
...It contains a miniature heat-generatorsuch as I was experimenting with recently in the Arizona desert...
Various 「Astounding Stories of Super-Science, August 1930」
...We’re not the only people experimenting with the Fifth Dimension...
William Fitzgerald Jenkins 「The Fifth-Dimension Tube」
...The thing was simple enough by daylight—after a little watching and experimenting...
Henry Lawson 「Joe Wilson and His Mates」
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