1204 FISHERIES OF THE UNITED STATES. [50] 



Smith's incline-plane return fish-way — Continued. 



of which interrupt the current and turn it in its course. The 

 floor of each alternate compartment is paved with stones, to 

 render them more attractive to the fish, and to afford resting 

 places while descending' the fish- way. Scale : Three-eighths«of 

 an inch to the foot (3V). Designed by Everett Smith, Portland, 

 Me. 42,944. U. S. Fish Commission. 



Lawrence fish -way. 



Model of Brackett's patent rectangular compartment fish-way on 

 the inclined-plane system, built in the Merrimac River at Law- 

 rence, Mass. Scale : One-eighth of an inch to the foot (- 9 l 6 -). 

 Designed and patented by E. A. Brackett, of Massachusetts. 

 Model by by C. G. Atkins. 26,939. The first section of this 

 fish-way is so arranged that it can be raised, thus entirely shut- 

 ting off the water at time of freshets or at seasons when the 

 way is not needed. 



HOLYOKE FISH-WAY. 



Model of fish-way built in the Connecticut Biver at Holyoke, Mass. 

 This is a rectangular compartment fish-way on the inclined 

 plane system, the peculiarity of this way being the submerged 

 piece of cob- work placed in the river to direct the fish to the 

 foot of the fish- way. Scale : One-eighth of an inch to the foot 

 (■9&)- Patented by E. A. Brackett, of Winchester, Mass. 

 26,937. Model by C. G. Atkins. The dam at Holyoke is 30, 

 feet high. The total height of the fish-way is 440 feet, giving 

 a fall of 1 foot in 15. It is said to carry a column of water 

 2 feet wide and 2 feet deep through the entire distance without 

 perceptible increase in velocity, the current at the lower end 

 being less than 10 miles per hour. 



Everleth's self-adjusting fish-way. 



This is an ordinary rectangular compartment fish-way on the in- 

 clined plane system, the upper end of which is provided with 

 a movable float that rises and falls with the fluctuations of the 

 river. By this arrangement the entrance of the fish-way is 

 always kept at the proper height to admit the required quantity 

 of water. Scale : One-fourth of an inch to the foot ( -^ g ). De- 

 signed by Dr. F. M. Everleth, of Waldoborough, Me. 26,930. 

 Model furnished by C. G. Atkins. 



Atkins's incline-plane return fish-way. 



In this model is shown the modification of the incline-plane fish-way 

 for delivering the water at the foot of the dam. It is provided 

 with gates for regulating the supply of water, and shows the 



