All the analogies by which inventors have been encouraged in their expectations are false, the rudders of ships and the tails of birds are no exceptions.

My rudder is my magic rod Of rule, on isles and seas: Blow, blow, ye winds, for lordly France, Or shores of swarthy Spain: Blow where ye list, of earth I'm lord, When monarch of the main.

The rudder is a light frame of cane covered with silk, somewhat of the form of an elongated battledoor, about three feet long, and one foot wide, where it is largest.

"(For rhyme the rudder is of verses, With which, like ships, they steer their courses.)"Hudibras. Iambics and trochaics, of corresponding metres, and exact in them, agree of course in both the number of feet and the number of syllables; but as the former are slightly redundant with double rhyme, so the latter are deficient as much, with single rhyme; yet, the number of feet may, and should, in these cases, be reckoned the same.