In diameter, but those of the larger ichthyosauri are of much greater dimensions.
He gives no diameter or wind-pressure.
In the rubber ring joint an india-rubber ring is used; slightly less in diameter than the pipe.
The front or cover of the case is a similar button of hard polished carbon D, also slightly smaller in diameter than the cylindrical wall of the box.
They have shown that columns of water of very small diameter can so resist tensile strain that they can be lifted bodily instead of flowing along the channel, They suggest that the forces causing the movement are complex, and draw particular attention to the pull upwards in consequence of disturbances in the leaves.