It is astonishing how quickly seaweed clings to a ship's bottom and thereby retards its speed.
The reason why cannabis retards growth is still unclear.
The Adam Sandler fan retards who labeled the film boring were more on target than most critics.
Suppose now that the plate is introduced so as to cover half the aperture and that it retards those pulses which would otherwise arrive first.
Oxide of zinc, like most heavy metallic oxides, is easily reduced to the metallic state by heating it to redness with charcoal; pure red zinc ore may be treated directly; and the same might be done with pure calamine of any kind, because the carbon dioxide of the zinc carbonate goes off below redness and the silica of zinc silicate only retards, but does not prevent, the reducing action of the charcoal.