'Corn measure' in the Bible

Men do not light a lamp and put it under the corn-measure, but on the lamp-stand, where it gives light to every one in the house.

And Jesus said to them: "Is a lamp brought to be put under the corn-measure or under the couch, instead of being put on the lampstand?

But no one having lit a lamp sets it in secret, nor under the corn-measure, but on the lamp-stand, that they who enter in may see the light.