KINEMATICS OF MACHINERY.
pulley, and therefore receives the signs and +, these being re- versed because the portion of the belt running on to one pulley
is the same as that running off the other. The band for the pulley a is identical coincident with that for I, the corre-
spending sign i must therefore be placed in the dotted line ; the belt is lastly open, and its two sides are inclined to each other
on account of the inequality of the pulleys, so that we must add the symbol Z, oblique, to the sign ^. If the belt were crossed