APPAKATUS USED IN CAPTURING FISH. 



263 



howerer, tliat the length of the leader varies with the locality, the object 

 generally being to carry the bowl into water of from three to five fath- 

 oms in depth. This, in some cases, will be accomplished with a leader 

 of one hundred and fifty yards, while, again, five hundred will be needed. 



NOAXK, CoxxKCTicuT, December 4, 1871. 

 Ueai! Silt: I do not know wlietlun- I c;iu oive you a satisfactory account of the con- 

 struction of my pound, but I will, at any rate, try to do so. Tlie leaders arc fastened 

 upon the i)oles' l)e.<;inninji; at the oft'-sliorc pole, strctchinrr the top rupt", from one pole 

 to the other, dniwiin;- it ti<>ht, fasteniuj; or seizing; to every pole. The bottom rope of 

 the leader is hauh'd down by ropes that are rove through every pole, close to the bottom, 



Fi"-. G. 



ISOAVI- 



23= iiicUmcsli, 

 (1>4 mcli bar) 

 27 &et deep. 



keeping the leader down 

 witiiout the use of chains, 

 and the same throughout 

 the whole gear, as yon see 

 l)y the drawing. 



A center line runs round 

 the bowl, nuirked on the 

 net half way from the top 

 to l)ottoin. and is fastened 

 to rings which slip up and 

 down the poles when we 

 haul and set the pounds, 

 which keeps tlie net close 

 to the poles, gi\ing room 

 inside tlie bowl. 



The door that opens 

 from the "heart" into the 

 l)ouud is six feet wide, ex- 

 tending from the top rope 

 of the bowl to the very 

 l)()ttom, like a gate-way. 



Tlie passage-way that 

 runs from the leader into 

 the heart, is sixteen feet 

 wide on each side of the 

 leader, extending from 

 top to bottom. 



The poles on the leader 

 are driven at ditfereut dis- 

 tances, beginning at the 

 otf-shore end twenty-six 

 feet, and varying up to 

 forty feet apart. Poles 

 on the heart and bowl are 

 also driven at dift'ereiit 

 distances apart, accord- 

 ing to the shape of the 

 net. 



When we lift the pound 

 we begin at the door, un- 

 tying the ropes that hold 

 the bowl to the bottom, 

 pulling on the ropes that 

 lift the bowl, following 

 from one pole to the other 

 round to the back, there 

 being a haul-down rope 

 and a lift-up rope to every 

 pole that is attached to the bowl, which raises the whole bottom to the surface, the 

 tish swimming ahead into the back of the bowl, and one or more boats going inside of 

 the bowl and pursing np that part of the net, bring the iish into close CDinpact. 

 Yours, truly, 



JOHN ROGERS. 



Professor Baikd. 



A still more complicated arrangement of a heart-pound is that in use 

 in Lake Michigan, and elsewhere in the great lakes, and preferred as 

 by far the mo'st efficient of all, as there is much less chance of the 



