...A broad knife, from twelve to eighteen inchesin length, is first inserted at the left side, and the women, whoare generally the operators, introduce onehand to scoop out the blood, which oozes slowly... 
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...The common method of using the solution of blue vitriol is to pour itfrom a bottle with a quill in the cork, into the foot, when the animallies on its back between the operators, as already described...
Robert Jennings 「Sheep, Swine, and Poultry」
...Our operators proceed by makingus inhale the fumes of ether or chloroform; the insect proceeds byinjecting a special virus that comes from the mandibular fangs ininfinitesimal doses...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
... The Wasps' possess only the acid element; and it is to this very acidity and not to the 'so-called' skill of the operators that the preservation of the provisions is due...
J. Henri Fabre 「Bramble-bees and Others」
... Chloride of iodine alone, is seldom if ever used now byAmerican operators, as it does not sufficiently come up to theirlocomotive principle of progression...
Henry H. Snelling 「The History and Practice of the Art of Photography」
...Some operators use prepared cotton, and think it more convenient than theflannel...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...In speaking of the above,reference is had to baths to the ordinary heights used by operators...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...This annoyance is a great source of complaintfrom many operators, and ever will be, so long as it is prepared by menwho have no reputation to lose, and whose eyes are blinded by the“Almighty Dollar...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...Senter, of Auburn, wasthe first of our operators who used a solution of iodine for coating theplate, and we several years since saw his results, which would rival theproduction of any other operator...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...Some operators are in thepractice of immersing the plate in the solution and buffing twice...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...Young operators are apt to impute all want of success in operating totheir chemicals, even though the cause is quite as likely to be elsewhere...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
...In the great catalogue of complaints made by operators, none is morecommon than that alleged against the quality of plates in general use...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
... Three men, evidently the operators, sat within...
Raymond King Cummings 「The White Invaders」
...Every day at noon a signal is sent to various parts of thecountry by telegraph, so that all operators and railway men who hearthat signal can set their clock at noon within two or three seconds...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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