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Trout rearing ponds at Seward Park, Seattle, 1948
1. Trout rearing ponds at Seward Park, Seattle, 1948
Bonneville Salmon Hatchery of the Oregon Fish and Game Commission showing rearing ponds, Oregon, n.d.
2. Bonneville Salmon Hatchery of the Oregon Fish and Game Commission showing rearing ponds, Oregon, n.d.
Troughs for Rearing Mussels In troughs supplied with naturally clarified water flowing from near
3. Troughs for Rearing Mussels
In troughs supplied with naturally clarified water flowing from near the surface of one of the ponds, the best conditions have been found for rearing several species of fresh-water mussels. As is the fortune of experimental work, success has been variable, but a single trough may produce in one season more than 2,000 young mussels one-fourth to one-half inch in length
Car with propeller in motion. From propeller the shafting may be followed back (1-8) to the universal
4. Car with propeller in motion. From propeller the shafting may be followed back (1-8) to the universal joint. 1. Propeller shaft; 2. sleeve coupling; 3. longitudinal shaft; 4. adjustible shaft hanger; 5. gear trains from longitudinal to transverse shafts; 6. transverse horizontal shaft of float; 7. shaft hanger; 8. ball joint connectin g shaft with that of house boat; 9. edge of rearing box; 10. brace across corner of rearing box; 11. holding-down plank mortised into corner post; 12. shaft beam
Floating laboratory and rearing plant from the port side. The forward (left) house serves as a laboratory
5. Floating laboratory and rearing plant from the port side. The forward (left) house serves as a laboratory and the after one as the engine house and tool room. Most of the rearing cars are covered with white awnings
Diagram of Apparatus Used in Hatching and Rearing Lobsters
6. Diagram of Apparatus Used in Hatching and Rearing Lobsters
View of Rearing Plant at Woods Hole Showing Method of Transmitting Power to the Fans
7. View of Rearing Plant at Woods Hole
Showing Method of Transmitting Power to the Fans
Rearing Plant Used in Experiments in 1902 at Woods Hole
8. Rearing Plant Used in Experiments in 1902
at Woods Hole
Bonny Ann Weber on rearing pony in Potlatch parade, Seattle, 1941
9. Bonny Ann Weber on rearing pony in Potlatch parade, Seattle, 1941
Woman on rearing horse, Kelly's Ranch, May 1940
10. Woman on rearing horse, Kelly’s Ranch, May 1940
Anthony's Turbot Rearing Tank, for the Experimental Hatching of the Turbot
11. Anthony's Turbot Rearing Tank, for the Experimental Hatching of the Turbot
Rearing ponds at Boca de Quadra Hatchery. Poles are placed across to sustain netting which prevents depredations
12. Rearing ponds at Boca de Quadra Hatchery. Poles are placed across to sustain netting which prevents depredations of birds
Rearing ponds at Fortmann Hatchery
13. Rearing ponds at Fortmann Hatchery
Diagram of the method used in experimental hatching of quahaug eggs and rearing of the young larvae at
14. Diagram of the method used in experimental hatching of quahaug eggs and rearing of the young larvae at the Wellfleet laboratory. It represents a cross-section of the laboratory, showing a small 1 1/2 horse power gasoline engine (B), connected by a belt with a pump (C), by which salt water is forced from below into a tank (A) situated near the roof. The laboratory is located on a wharf over the water, which enables salt water to be obtained directly from beneath the floor. The inlet of the pump is guarded by a strainer (H), which prevents seaweed entering the pipe. From the tank the salt water is conducted through the laboratory by a large pipe set with small petcocks. From these petcocks pieces of rubber tubing (F) lead to the hatching tubs (E), which consist of half barrels fitted with sand filters (D). The tubs are placed over a sink (G) which carries off the filtered water. By this arrangement a continuous flow of water is established through the hatching tanks.
Map of the oyster and seaweed concession in one of the estuaries of Nihojima, to show how completely
15. Map of the oyster and seaweed concession in one of the estuaries of Nihojima, to show how completely the cultural area is developed: I, collectors bearing purple seaweek; II, collectors bearing oysters; III, grounds for rearing oysters; IV, cultural area for other mollusks, Tapes, Arca, etc.
Map of the oyster and seaweed concessions in one of the estuaries of Nihojima, to show how completely
16. Map of the oyster and seaweed concessions in one of the estuaries of Nihojima, to show how completely the cultural area is developed. 1, Shibi bearing purple seaweed; II, shibi bearing oysters; III, grounds for rearing oysters; iv, cultural area for other mollusks, tapes, arca, etc.
Artificial propagated oyster spat collected on sea-scallop shells for observation. Lower row, spat 7
17. Artificial propagated oyster spat collected on sea-scallop shells for observation. Lower row, spat 7 weeks old; upper row, spat three weeks old. The three shells on the lift in the upper row were kept in the rearing tank while the others were placed in the harbor
View of interior of a car, showing filter of gravel and sand placed over one of the bottom windows. Arrangement
18. View of interior of a car, showing filter of gravel and sand placed over one of the bottom windows. Arrangement ... for rearing very minute larvae, or those for which screen windows are dangerous. The car is calked tight; water is poured over the top by bucket chains...and its only exit is through this bottom filer
Interior of rearing car. Preparing to calk small cracks before lowering the car. 1. side window; 2. end
19. Interior of rearing car. Preparing to calk small cracks before lowering the car. 1. side window; 2. end slot; 3. doors for same; 4. buttons to hold doors shut; 5 and 6. the transverse shaft, universal joint, and sliding sleeve; 8. exhaust and muffler
Interior of rearing car, and propeller. 1. slot in end of car; 2. doors for closing the slot; 3. side
20. Interior of rearing car, and propeller. 1. slot in end of car; 2. doors for closing the slot; 3. side screen windows; 4 and 5. bottom windows; 6. box covering gear trains; 7. transverse shaft; 8. longitudinal shaft; 9. towing car. The arrangement of shafting on farther float can be seen
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results 1-20 of 54 item(s)  page 1 of 3 : ( <<  1  2  3  >> ) :: previous : next
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