FISHERIES OF THE UNITED STATES. 181 



RESULTS OF WOEK. 



1. Publications of the Commissiou — Continued. 



Al'PE.VDix D— Continued. 



XSIL Papers relating to practical tisli-culture — Cont'd. 



C. Fisli-ciiltnre in salt or brackisli waters. By 



Theodore Lyman, fisli commissioner Page, 



of MassacLiisetts 575 



D. Dcscri])tion.s of improved apparatus in fish- 



b.itching 578 



1. Slnd-batching or floating boxes 578 



Setb Green'.s box 578 



Brackett's box 579 



StilhvcU & Atkins's bos 570 



2. Tray apparatus for batching 580 



Hatun's tray batching apparatus 580 



Clark's tray batching apparatus 582 



Williamson's hatching box 585 



'•i. The brook shanty 586 



E. Frog-culture. By Seth Green 587 



1. How to get the spawn 587 



2. How to take care of them 587 



AppendixE.— Obstructions to theupward movement of fishes 



in stre.ims and the remedy 589 



XXIIT. On tish-ways. By Charles G. Atkins 591 



^. Introductory remarks 591 



B. Habits of migratory tishes 591 



C. The construction and location of fish-ways. 594 



1. Situation 594 



2. Attractiveness 596 



'J. Ea.se of ascent 601 



D. Devices which are in use or have been pro- 



posed 003 



1. Gap 604 



2. Trench or Cai)e Cod fish-way 604 



'.i. Oblique groove 605 



4. Step fl.sb- ways 005 



5. Suiith's fish- way 600 



0. Call's fish- way 607 



7. Pike's fish-way 609 



8. Steck's fish-way 010 



9. luiliiitd-plane fish-ways. 610 



10. The Pennsylvania fish- ways 610 



11. The common rectangular fish-way 611 



12. Brackett's fish-way 612 



13. Fish-ways with oblique partitions 613 



14. General arrangement 614 



E. Subsidiary considerations 615 



1. Protection against floods 615 



2. Material and cost 615 



XXI'\r. On obstructions to the ascent of fish in cer- 

 tain rivers 617 



A. Obstructions in the rivers of Maine. By E. ' 



M. Stilwell 618 



Saint Croix Piver 617 



Penmaynan River 617 



Dennys Elver 617 



Orange River - 617 



East Machias River 618 



Macbias River 618 



SVescongus or Pleas.ant River 618 



Narraguagus River 618 



"Onion River ^618 



Penobscot River and tributaries 618 



Saint George River 619 



