CANVASS-BACK. 



271 



ment permits tlie wings to be folded more readily upon the 

 deck. 



L, L, Points at which a rope is passed through the carlings 

 supporting the deck, to the middle or light of which rope the 

 cable of the head anchor is attached. 



M. Point at which the foot anchor is attached to the carling 

 supporting the deck. 



Having given, we trust, a satisfactory explanation of the 

 model, we will now proceed to give some special instructions 

 as to the building of the Battery. The timber most usually 

 emplo3'ed is one inch white pine, except in the case of the head 

 and /oo^ of the Box, which should be made of two-inch oak, or_ 

 some other hard and durable wood. The side-boards and bot- 

 tom of the Box are attached to the head and foot; and the 

 strength of the Box, as well as the deck, is in a great measure 

 dependent upon these oaken timbers. 



The carlings^ or small beams which support the platform or 

 deck are also made of oak, one and a half inch thick, five inches 

 wide in centre, reduced at their extremities to one and a half 

 inch, and secured to the ends and sides of the Box by means of 

 screw-bolts, or large wrought nails. 



The length, width, and depth of the Box, must of course be 

 proportioned to the size of the Shooter ; for an ordinary sized 

 individual, the following dimensions are amply sufficient: — 



The deck is not a perfect plane, but declines, or rather is 



