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results 41-60 of 71 item(s)  page 3 of 4 : ( <<  1  2  3  4  >> ) :: previous : next
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Mayflies: Ephemera viria Etn. 1. Lateral view of the nymph. Note the latero-dorsal breathing organs or
41. Mayflies: Ephemera viria Etn. 1. Lateral view of the nymph. Note the latero-dorsal breathing organs or gills on the abdominal segments; 2. Dorsal view of the nymph. This view shows how these organs may arch over the back; 3. Lateral view of the male imagop; 4. Dorsal view of the male imago
Siphturus alternatus Say.: 5. Lateral view of the nymph. This larva possesses a different type of abdominal breathing organs or gills; 6. Dorsal view of the nymph. This view shows the overlapping of the gills and also gives some hint of the number of trachae or air tubes, represented by black lines in each; 7. Lateral view of the male imago
Paralichthys. Group of Paralichthys on a white background containing considerable debris scattered over
42. Paralichthys. Group of Paralichthys on a white background containing considerable debris scattered over it. All of the specimens are albiguttus except the large one above and to the left, which is dentalus. Note that this specimen has five dark areas, two rather inconspicuous ones near the head and three near the posterior end. In some specimens there are several others nearly as conspicuous as these. In albiguttus there are but three, the two near the posterior end of the base of the fin being absent. The difference in shade in the different individuals is largely due to difference in their past experience
Mackerel Purse-Seine Fishery Fig.1, Diagram showing the different sections of a purse-seine: A and
43. Mackerel Purse-Seine Fishery
Fig.1, Diagram showing the different sections of a purse-seine: A and J, arms of net; B and I, wings; C, D, K, and L, border of stout twine; F, bailing piece or bunt; E and G, sides; H, under
Fig.2. Diagram showing the form of a purse-seine when spread in the waterr
Link Between the East and West Indies Palaeopneustes hemingi, Anderson, a Sea-urchin discovered by
44. Link Between the East and West Indies
Palaeopneustes hemingi, Anderson, a Sea-urchin discovered by Dr. A. R. S. Anderson in the depths of the Laccadive Sea. It is hardly different from the Palaeopneustes cristatus dredged by Professor Agassiz off the West Indies. The shell has been denuded of its spines, so as to lay bare its sculpture
View of the casting room. Here rough castings are stored after leaving the foundry. From this room the
45. View of the casting room. Here rough castings are stored after leaving the foundry. From this room the castings are delivered in the rough to the different machines and when finished are placed in stock room : Standard Gas Engine Company, Oakland, California
Bliss No. 1K Semi-Automatic Water Tester.--A machine for testing round or square cans from 1 1/2 to 6
46. Bliss No. 1K Semi-Automatic Water Tester.--A machine for testing round or square cans from 1 1/2 to 6 3/4 inches in diamter by 1 1/2 to 6 inches in length, or the equivalent. Adapted for sanitary cans. It may also be arranged for larger work. Some of the different style cans, for the testing of which it is used, are shown in the illustration. The output, which depends on the size of can and the expertness of the operator, is from 4,000 to 10,000 cans a day.
Bliss No.253 Double End Flanging Machine.--This machine rapidly flanges both ends of can bodies (soldered
47. Bliss No.253 Double End Flanging Machine.--This machine rapidly flanges both ends of can bodies (soldered or lock seamed) in preparation for double seaming tops and bottoms. A special patented device prevents the receding of the tail sotck during the operation, insuring univorm and even flanges. It will handle bodies 2 to 8 1/2 inches in diameter by 2 to 10 3/4 inches in height, and is easily adjusted for different sizes of cans.
Scallops: Variation in size of scallops. The two on the left are fifteen months old, while the two on
48. Scallops: Variation in size of scallops. The two on the left are fifteen months old, while the two on the right are 'seed' scallops three months old. The difference in size in scallops of the same age, especially in different localities, renders impossible the definition of a 'seed' scallop by means of a size limit
Nassa obsoleta (the little black winkle of the tide flats) devouring a scallop. These little scavengers
49. Nassa obsoleta (the little black winkle of the tide flats) devouring a scallop. These little scavengers swarm over the scallop. Occasionally one is active enough to get between the valves, forming a wedge which permits the entrance of others, which quickly consume the scallop. Owing to the alertness of the scallop and its different habitat (Nassa usually being found on the tide flats) little damage is done
Graphic representation of the growth of the average scallop and its gain in volume. Starting September
50. Graphic representation of the growth of the average scallop and its gain in volume. Starting September 1 with 1 bushel of 1/2-inch scallops, the increase in volume is represented on the right in terms of bushels, corresponding to the different sized scallops on the left: (1) two-month scallop, .5 of an inch, 1 bushel; (2) three-month scallop, .91 of an inch, 7.3 bushels; (3) five-month scallop, 1.34 inches, 26.5 bushels; (4) thirteen month scallop, 1.75 inches, 62 bushels; (5) seventeen-month scallop, 2.41 inches, 185.6 bushels.... This repid increase shows the benefit of preserving the 'seed' scallop, as the yield in large scallops will more than repay the fisherman for his foresight
General label defining the class Pisces. Framed copies of this label are placed in various parts of the
51. General label defining the class Pisces. Framed copies of this label are placed in various parts of the fish hall. The figure of the mackerel at the top is drawn by hand. A different species is represented on each copy of the label, corresponding to the fish forms near which it is placed
Placing cheese-cloth retainers over nests containing bass fry about ready to swim up. Most of the nests
52. Placing cheese-cloth retainers over nests containing bass fry about ready to swim up. Most of the nests are seen covered with retainers. When a nest is occupied it is numbered and complete record kept of its different stages. The retainers are to confine the fry for convenience in transferring to other ponds to make room for following broods. (Mammoth Hot Springs, Arkansas)
Iron Splitter Codfish Dressing Machine: Removes the head, entrails (without damage to the liver), black
53. Iron Splitter Codfish Dressing Machine: Removes the head, entrails (without damage to the liver), black napes and backbone. Self-adjusting to different sizes of fish. Splits, dresses and cleans the fish perfectly at rate of 60 per minute
World Can Labeler : for Round Cans. Quickly adjustable for different sizes. Only one kind of paste needed.
54. World Can Labeler : for Round Cans. Quickly adjustable for different sizes. Only one kind of paste needed. No dripping paste. No wasted labels. Speedy and durable. Mechanically correct. Economic Machinery Co., Worcester, Mass.
Box-Testing Machine.... Obstructions of various kinds on the inside of the drum cause the boxes to
55. Box-Testing Machine....
Obstructions of various kinds on the inside of the drum cause the boxes to slide, roll, and drop in different positions
One of the Cars Used by the Department [i.e. the United States Fisheries Bureau] in the Transportation
56. One of the Cars Used by the Department [i.e. the United States Fisheries Bureau] in the Transportation of Live Fish to Different Parts of the Country
Different positions of Cape Ferret from 1768 to 1863
57. Different positions of Cape Ferret from 1768 to 1863
Scallops: Variation in size of scallops. The two on the left are fifteen months old, while the two on
58. Scallops: Variation in size of scallops. The two on the left are fifteen months old, while the two on the right are 'seed' scallops three months old. The difference in size in scallops of the same age, especially in different localities, renders impossibl
Placing cheese-cloth retainers over nests containing bass fry about ready to swim up. Most of the nests
59. Placing cheese-cloth retainers over nests containing bass fry about ready to swim up. Most of the nests are seen covered with retainers. When a nest is occupied it is numbered and complete record kept of its different stages. The retainers are to confine
Shibi of different rows, new and old, in boundary hedge, showing how they are planted to give mutual
60. Shibi of different rows, new and old, in boundary hedge, showing how they are planted to give mutual support
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