PURCHASES 33

—Fig 94, by using three single blocks; Fig. 95 by using one double
block and two single blocks Power gamed—five times The dis-
advantage of this form of purchase is the very short travel of the lower
block as the whip block comes down and meets the lower block going
up.

How to reeve a three-fold purchase with the .hauling and standing
parts of the fall in the middle sheave holes

Place the two blocks on deck with the tails of the blocks towards
each other. The one to take the hauling and standing parts of the
fall should have a good becket or eye in the tail, and should be laid on
its edge having the swallows up and down. (Call this No. 1 block )
The other one should be laid on its cheek having the swallows parallel
to the deck. Lay the blocks close together and stand in line with them,
having No. 1 furthest away from you

Take the end of the fall from, the coil and reeve it downwards through
the middle sheavehole of No 1 block, then from right to left through
the lower sheavehole of the other block, then upwards through the left
hand sheavehole of No 1 block, and from left to right through the top
sheavehole in the other block.

You should not go wrong now as there is only one vacant sheavehole
in No 1 block (the right hand one). Reeve downwards through this,
then from right to left through the middle sheavehole in the other block,
making the end fast to the tail of No. 1 block.

CMAlft STOPPER On