The yard-arms are lashed together at the ends, then sprung apart at the middle so that the cross-arm blocks will fit between them. To properly hold the arms in place a strap should be drawn around the sticks at the middle, and to insure a good prop a block six inches long, two inches wide, and seven-eighths of an inch thick is to be cut and provided with two pins at each end as shown in Fig. 2 C. The pins will fit into small holes made in the long sticks, and when the strap is buckled tight the block will be held securely in place.
A large flat hook should be lashed fast to this block, and when sailing along before the wind this can be caught over a stout leather belt to help support the weight of the sail.
Two twilled-cotton sails are made in the shape shown in the illustration and provided with snaps at the three outer ends so that they may catch into eyes lashed fast to the ends of the arms and to the long sticks as shown in Fig. 2 B. The sails should be drawn taut at the inner ends with rings and a strap or light rope. If there should be too much sail-area for the wind that may be blowing the sail can be feathered—that is, bent down or up so that it allows some of the wind to pass under it instead of pressing against the sails with its full force.
A SKATING-SAIL, A SQUARE-RIGGED ICE-SAIL, AND A SNOWBALL MORTAR
A Square-rigged Ice-sail
In Fig. 3 two square sails are supported at the ends of crossed yard-arms fourteen feet long. Four cross-sticks of equal length are made, the same as those for the skating-sail first described, and at the middle a long block is attached to two of them as shown in Fig. 2 A. Pins in the ends of the blocks fit into holes in the long arms, and when the ends of the long arms are bent in they grip the pins and blocks.
Short blocks provided with a single pin are lashed to the outer cross-sticks eight inches in from the ends. Holes made in the outer ends of the long sticks will receive these pins, the spring of the stick holding both inner and outer cross-sticks in place at the same time.
Heavy sheeting or unbleached muslin sails may be stretched and bound to the cross-sticks and when detached they can be rolled up on the sticks. This sail is handled the same as the skating-sail but is more powerful as the sheets are larger.