788 LIST OF ILLUSTRATIONS. 



Platk XVJII. Fig. 2. Plaii-vie\Y of box. 



Fig. 3. Piau-view of gauge-screens. 



Fig. 4. Perspective view of shallow pan ; coutaiuiag gauze-screen while depos- 

 iting the eggs. 



Fig. 5. Skeleton of hatching-basket. 



Fig. 6. Hatching-basket plaited or wattled with juuipor-bougbs. 

 Plate XIX. Illustrations to accompany paper by Theodore Lyiuau ou tish-culture in 

 brackish waters, (p. 575.) 



Fig. 1. Outer side of dam ; a, flowagecut ; h, waste-way. 



Fig. 2. Section of the dam at the waste-way ; c, iuner screen protecting outer 

 screens from driftwood and logs ; d, second screen with finer grat- 

 ing ; e, central screen, with grating, as in Fig 4, to stop the fish ; /, 

 seaward screen to protect from action of waves and floating mate- 

 rials. 



Fig. 3. Plan-view of waste-way of dam ; letters same as in Fig. 2. 



Fig. 4. Grating, e, of vertical rods and horizontal wires, fall size. 



Fig. 5. Inner side of dam ; A B, natural level of brook at low tide ; C D, level 

 of pond at low tide after dam is bailt; E F, level of pond at high 

 tide, both before and after dam is built; a, bed of brook, outlet 

 open ; h, waste-way. 



Fig. 6. Longitudinal section of pond ; C D, level of pond at low tide after 

 dam is built ; E F, level of pond at high tide, both before and after 

 dam is built ; E, fresh water supplied from brook G ; F, salt-water 

 supplied from sea. 

 Plate XX. Fish-ways in the Columbia dam, Susquehanna River, Pennsylvania, (pp. 

 600, 601, 604, and 610;) scale, 24 feet to an inch ; intended mainly fur 

 the passage of shad. 



Fig. 1. Fish-way of 1873 ; plan in outline. 



Fig. 2. Fish-way of 1S73 ; profile through A B of Fig. 1. 



Fig. 3. Fish-way of 1865 ; plan in outline. 



Fig. 4. Profile through C U, Fig. 3. 

 Plate XXI. Inclined-plane fish-ways, (pp.604 and 610.) The arrows show the direc- 

 tion of the current. 



Fig. 1. The Swazey plan, invented by Alfred Swazey, of Bucksport, Me., (p. 614. ) 



Fig. 2. The same, with additions by C. G. Atkins, (p. 614.) 



Fig. 3. The Foster plan. 



Fig. 4. The same modified, as built on Penmaquan River, (p. 613.) 



Fig. 5. From a design for a fish- way ou Androscoggin River, August, 1870. 



Fig. 6. The Brackett plan ; patented by E. A. Brackett, of Massachusetts. 

 Plate XXII. Plans offish-ways, (pp. 606, 607, 610, 612.) 



Fig. 1. Smith's fish-way; invented by James Smith, of Daanstone, Scotland, 

 1840, (p. 607.) 



Fig. 2. Steck's fish-way; invented by Daniel Stock, of Pennsylvania, (p. 610.) 



Fig. 3. A recent device, not tested : the slanting boards will probably assist 

 alewives. 



Fig. 4. The pool fish-way, (p. 606.) 



Fig. 5. E.A. Brackett's improvement in fish-ways; patented October 22, 1872, 

 No. 132349. 1, a vertical section : A, location of dam ; B, the trough 

 or chute inclosing way; d, abutments or partial bulk-heads in chute ; 

 e,f, bends or wings extending at right angles with bends or bulk- 

 heads. 2, side-elevation : b", lowest water-inlet or supply-port in 

 chute ; c, gate for closing inlet-port ; A and B, same as in 1. 3, A, B, 

 ]}'-, c, d,e, and /, same as in 1 and 2 ; a, discharge-port at lower end ; 

 h, h^, additional inlet-ports, (p. 612.) 

 Plate XXIII. Plan of Brackett's fish- way at South Hadley Falls, Mass., (p. 612.) 



