U. S. B. F.— Doc. 912. 



I 



I 



LONGITUDINAL SECTIOH 

 THR.OUGH SUPPLY TROUGH 



CROSS SECTION 

 THROUGH SUPPLY TROUGH 



LONGITUDINAL SECTION CROSS SECTION 



THROUGH DRAIN TROUGH THROUGH DRAIN TROUGH 



LONGITUDINAL SECTION 

 AT JOINT BETWEEN SUPPLY^ 

 DRAIN TROUGH 



M!^///////M/^///M/M.'//y///y/y/'/M/. Yy////^/////////M//////-////M////M,.,/////////M ,/^,,//////,/'.:', . v/////////^///////////////////////, jyu//<y<i:Y//////M/////M////////M//////^^^^ , u . -'/i',i/i . . . , M'///'<',y/-/<: 7t< . 



^ 



'i^M //////M//////////, 'M^/y//M/M/////, 



SECTION A-B. 



Fic. 1.— Plan of halchln 



(Ppsliriipil l.y J. IV Snycinr.) 



Iiiii:;n7*— L'2. (Pare p. 32.) 



