[I]t [opium] is a double-edged sword, a divine gift in the hands of a master, a poison in those of a mere routinist—a medicaster—a demi-physician.

Those mechanical colored pencils work great because they don't have to be sharpened.

The upper limit of temperature is determined by the point at which fusion of the ore takes place, or often, for practical purposes, the temperature at which the ore softens and agglomerates.

If the weather be wet while the turnips are feeding off, the ground breaks up very cloddily: in which case, if the roller does not reduce the clods, it will require to be stirred again and again with the plough […]