...The opening cuts having been made, the broad-pointed “skinning-knife”was duly sharpened, and with it the operator fell to work to detach theskin from the body in the shortest possible time... 
William T. Hornaday 「The Extermination of the American Bison」
...The inexperienced operator can readily locatedead eggs by smelling over the tray...
Harry M. Lamon 「Ducks and Geese」
...The amount of cooling which the eggs requireseems to vary greatly and here again the judgmentof the operator comes into play...
Harry M. Lamon 「Ducks and Geese」
...Thecatheter then glides forward, and the operator, resigning the hold of thepenis to his assistant, passes his free hand to the perinæum...
Dinks, Mayhew, and Hutchinson 「The Dog」
...The operator then takes a straightprobe-pointed bistoury, and having introduced it into the orifice, bymaking only pressure, instantly divides the sac...
Dinks, Mayhew, and Hutchinson 「The Dog」
..., the knee of the operator pressingon its neck, and the wool is removed from the legs and buttocks...
Ambrose Blacklock 「A Treatise on Sheep:」
...If the hoofs are long, and especially if theyare dry and tough, the assistant presents each foot to the operator whoshortens the hoof withthe toe-nippers...
Robert Jennings 「Sheep, Swine, and Poultry」
...In certain cases with a live calf a skillful operator may be justifiedin cutting into the abdomen and extracting the calf with its membranes, usingthe lotion just named as an antiseptic...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...If the cow is lying, the operator should first secure the foot on the upper side and then, if necessary, turn the cow on its opposite side so as to bring up the other...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Meanwhile the operator may secure an opportunity of reaching andseizing the nose or of passing a blunt hook into the angle of the mouth...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...If the operator is not familiar withthe normal appearance of the joint, it is well to make a comparison between theinjured and the sound one...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...When spraying, the operator should see to it that neither he nor the animalsinhale any of the spray...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The leech is attracted by this, and comes down the nostril, whenit can be caught if the operator is quick enough...
Joshua A. Nunn 「Notes on Stable Management in India and the Colonies」
...By thismethod the operator grasps the bird firmly in the left hand with thethumb and fingers about the neck and the breast and wing, butts heldsecurely in the hand...
Carl Dare 「Profitable Squab Breeding」
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