...The mind of the operator is electrically connectedto the mind of the victim... 
Various 「Astounding Stories, August, 1931」
... At the foot of the nearest piece, stood the operator, rod in hand, and with impassive face...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...While no secondtest is made of the eggs left in the machines theexperienced incubator operator is constantly on thewatch for and is constantly removing any eggswhich die at a later time...
Harry M. Lamon 「Ducks and Geese」
...The inexperienced operator can readily locatedead eggs by smelling over the tray...
Harry M. Lamon 「Ducks and Geese」
...This sprayingis done once or twice a day as the operator maythink necessary until the eggs begin to hatch...
Harry M. Lamon 「Ducks and Geese」
...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」
...In doing this the operator must carefully see that the mouth does not drop openso that the sharp, front teeth cut through the floor of the womb...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The operator should smear his armswith carbolized lard or vaseline to protect them against infection, andparticularly in delayed cases with putrid membranes...
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」
...The success of surgical operationsdepends on the judgment, skill, and dexterity, as well as upon the knowledge ofthe operator...
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」
...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」
... We will try once more, this time with a victim paralysed not by me, an unskilled operator, but by an adept whose ability ranks so high that it is beyond discussion...
J. Henri Fabre 「More Hunting Wasps」
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