APPARATUS USED IX CAPTURING FISH. 



263 



howerer, that the length of the leader varies with tlie locality, the object 

 generally being to carry the bowl into water of from three to live 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. 



XOAXK, Connecticut, Decemher 4, 1871. 

 Dear Sir : I do not know whether I cnn jijive yon a satisfactory acconnt of the con- 

 strnction of iny pound, bnt I will, at any rate, try to do so. The leaders are fastened 

 upon the poles', heoinuiuo- at the off-shore pole, stretchln-;- the top rope from one pole 

 to the other, drawing- it tight, fastenino- or seiziusj to every pole. The bottom rope of 

 the leader is hauled down by ropes that are rove through every pole, close to the bottom. 



Fio-. 



Toclait- 



2UinthTv\£sJi, 

 25 feet square , 

 •JT feet dtep. 



keeping the leader down 

 without the use of chains, 

 and the same throughout 

 the whole gear, as you see 

 by the drawing. 



A center line runs round 

 the bowl, marked on the 

 net half way from the top 

 to bottom, and is fastened 

 to rings which slip up and 

 down the poles wheu we 

 haul and set the pounds, 

 which keeps the net close 

 to the poles, giving room 

 inside the bowl. 



The door that opens 

 from the '' heart " into the 

 pound is six feet wide, ex- 

 tending from the top rope 

 of the bowl to the very 

 bottom, like a gate-way. 



The 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 different dis- 

 tances, beginning at the 

 ofl-shore end twenty-six 

 feet, and varying up to 

 forty feet apart. Poles 

 on the ieart and bowl are 

 also driven at different 

 distances apart, accord- 

 ing to the shape of the 

 net. 



When we lift the pound 

 we 5egin at the door, un- 

 tyi'ig 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 up that part of the net, bring the iish into close compact. 

 Yours, truly, 



JOHN ROGERS. 



Professor Baird. 



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 most efficient of all, as there is much less chance of the 



