...The artificial key is supplemented by line drawings of skulls of certainspecies and by a minimum of text to aid the user of the key... 
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...All the circumstances seem to point to it: the Osmia of the quarries is an inveterate user of Snail-shells; so far as heredity is concerned, she knows nothing whatever of reeds...
J. Henri Fabre 「Bramble-bees and Others」
...A beautiful proof of thistruth is familiar to every user of a telescope...
Robert Stawell Ball 「The Story of the Heavens」
...It may be remarked that this lastadjustment is the proper work of the optician, since it is so difficultthat the user of the telescope cannot ordinarily effect it...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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