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results 141-160 of 210 item(s)  page 8 of 11 : ( <<  1  2  3  4  5  6  7  8  9  10  >> ) :: previous : next
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Plan of biological raft used at Monomoy Point for growth experiments and spat collecting. The raft, 20
141. Plan of biological raft used at Monomoy Point for growth experiments and spat collecting. The raft, 20 feet long by 10 feet wide, provided with a central well and four trap-doors, was anchored to the Powder Hole in 20 feet of water. Wire cages and wooden boxes were suspended at various depths from the raft. Many kinds of mollusks were caught and raised in these spat boxes. The raft proved particularly useful in the study of the post-embryonic life history, as the scallops 'set' in large numbers on the boxes, cages and ropes, where specimens could be obtained in all stages of development for laboratory examination. Also, many interesting growth experiments upon the quahaug, scallop and clam were conducted in sand boxes
Penobscot River salmon weir. Large nubers of these traps are set in the Penobscot during the short season,
142. Penobscot River salmon weir. Large nubers of these traps are set in the Penobscot during the short season, and they intercept practically the entire run of salmon. The fish thus caught are the sole source of eggs for the hatchery on Craig Brook, a small tributary of the Penobscot
Detail of propeller shaft couplings. 1. underside of shaft beam; 3. upper steel portion of shaft, which
143. Detail of propeller shaft couplings. 1. underside of shaft beam; 3. upper steel portion of shaft, which bears gear on tp and enters sleeve coupling below; 4. cast sleeve coupling; 5. set screws holding shafts in coupling; 6. short piece of steel shaft; 7. pipe coupling; 8. lower part of shaft made of pipe; 9. measuring stick made of section 6 inches long
Detail of device for extension and universal movement. 1. adjustable shaft hanger on house boat; 2. ball
144. Detail of device for extension and universal movement. 1. adjustable shaft hanger on house boat; 2. ball joint; 3. square shafting, fastened by set screws into ball joint at left, and also (4) into sleeve; 4 and 5. screws through flanges of sleeve; 6. oil holes; 7. square shaft which slides in and out of sleeve; 8. shaft hanger upon side float
Downing jars set up for use on 'battery' at Put-in Bay station, Ohio. The troughs into which the water
145. Downing jars set up for use on 'battery' at Put-in Bay station, Ohio. The troughs into which the water flow from the pitcher mouth of the jars serve also to supply the jars in the next tier, by means of the wooden faucets, and there is a small overflow at alternate ends of each trough. This is the common equipment for hatching whitefish and pike perch
Pound-Net Fisheries of the Atlantic States Pound-Net at Woods Hole, Mass. Heart or Pound Net as
146. Pound-Net Fisheries of the Atlantic States
Pound-Net at Woods Hole, Mass.
Heart or Pound Net as set in Rhode Island
Slat Weir East Dennis, Mass. Bay
Mackerel Gill-Net Fishery Drag-nets set at night off coast of Maine
147. Mackerel Gill-Net Fishery
Drag-nets set at night off coast of Maine
Haddock Fishery Setting haddock trawls from schooner under sail; set at right angles to course of
148. Haddock Fishery
Setting haddock trawls from schooner under sail; set at right angles to course of the vessel
With the Clam, Crab and Oyster Fishermen. 1. Emptying a crab pot. 2 Ready to set a crab hoop net. 3.
149. With the Clam, Crab and Oyster Fishermen.
1. Emptying a crab pot.
2 Ready to set a crab hoop net.
3. Tonging Oysters in California
4. Digging razor clams
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
150. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
151. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
152. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
153. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
154. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908.
155. Glimpses of the Exposition Grounds and Views of the Various Buildings Completed in the Fall of 1908. Pictures...taken Eight Months Before the Date set for the Opening of the Exposition
Baiting Set Lines
156. Baiting Set Lines
Bamboo collectors arranged after the fashion common in Kusatsu. They stand about 3 feet above the bottom
157. Bamboo collectors arranged after the fashion common in Kusatsu. They stand about 3 feet above the bottom and their tips diverge; the clumps are set 4 or 5 feet apart
Penobscot River salmon weir. Large nubers of these traps are set in the Penobscot during the short season,
158. Penobscot River salmon weir. Large nubers of these traps are set in the Penobscot during the short season, and they intercept practically the entire run of salmon. The fish thus caught are the sole source of eggs for the hatchery on Craig Brook, a small t
Bamboo collectors arranged after the fashion common in Kusatsu. The shibi stand about 3 feet above the
159. Bamboo collectors arranged after the fashion common in Kusatsu. The shibi stand about 3 feet above the bottom and their tips diverge; the clumps are set 4 or 5 feet apart
Double Fyke; 'Set of Fykes.' Maryland
160. Double Fyke; 'Set of Fykes.' Maryland
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results 141-160 of 210 item(s)  page 8 of 11 : ( <<  1  2  3  4  5  6  7  8  9  10  >> ) :: previous : next
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