Obama, Marsha Blackburn, John Kline : President Barack Obama talks with Rep. Marsha Blackburn, (R-Tenn.) and Rep. John Kline (R-Minn.) following the health insurance reform meeting at Blair House in Washington, D.C., Feb. 25, 2010. (Official White House Photo by Pete Souza)

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Bridge at Arles : Die Brücke von Arles. Mai 1888 Öl auf Leinwand, 49,5 x 64 cm Wallraf-Richartz-Museum, Köln. May, 1888.

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Wireworm

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Dish of Rouen enamelled pottery : Dish of Rouen enamelled pottery, painted in blues and deep red.

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Painting from a Pyxis : Painting from a small toilet-box or pyxis, showing painted vases used to decorate a lady's room. On the left is a gilt pyxis with a tall lid, and an aenochoe on a low table; on the right two tall vases (lebes) on a plinth. All except the pyxis are decorated with painted figures, and contain flowers.

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Dovetailed Tenon in Carpentry

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Two segments of Scolopendra : Two segments of Scolopendra, showing the branching and anastomising tracheae and a spiracle (sp). (After Hasse, Zool Beiträge, i. pt. 65, 1884, by permission of J. N. Kern.)

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Aeluropus melanoleucus : The Parti-coloured Bear, or Giant Panda (Aeluropus melanoleucus).

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Brickwork

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Express Locomotive Boiler : Express Locomotive Boiler, with a widened fire-box (Great Northern Railway, England). The grate area is 30.9 sq. ft. and the heating surface 2500 sq. ft. The barrel is 5 ft. 6 in. diameter, 16 ft. long between tube plates. The fire-box crown is stayed by vertical stays extending to the shell crown, except for the three rows of stays nearest ...

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Silchester : General Plan of Silchester (Calleva Atrebatum). Silchester, remarkable as the one town in the whole Roman empire which has been completely and systematically uncovered. As we see it today, it is an open space of 100 acres, set on a hill with a wide prospect east and south and west, in shape an irregular hexagon, enclosed in a circuit of a mil...

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Book-plate of Freiherr V. Lipperheide : Book-plate of Freiherr V. Lipperheide. By Karl Rickelt. Nil Temere Nil Timide.

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Vertebral column of Hymenochirus : Vertebral column of Hymenochirus (ventral view).

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Hive bee, drone : Hive bee (Apis mellifica), drone. (From Cheshire\'s Bees and Bee-keeping, Scientific and Practical.)

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Capital from Hall of Abencerrages : Capital and Springing of Arch from the Hall of Abencerrages, Alhambra, Granada, Spain. Though commenced in 1245, the existing palace of the Alhambra was built in the first half of the 14th century, at a time when the style was fully developed. The palace's Hall of Abencerrages (35 ft. square) has a polygonal dome covered with arabesque.

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Structure of Collembola : Isotoma hibernica: 1. Side view. 2. Ocelli and post-antennal organ of right side. 3. Tip of terminal antennal segment with antennal organ. 4. Mandible. 5. Tip of left dens with mucro. Outer view. 6. Hind-foot with claws, x 240. Entomobrya anomala: 7. Catch.

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Guadalajara Cathedral Interior : Interior of the Cathedral of Guadalajara, Mexico

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Babirusa : Old Male Babirusa (Babirusa alfurus).

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Under Side of Worker Bee : Under Side of Worker Bee, carrying Wax Scales (From Cheshire's Bees and Bee-keeping.)

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Siphon Barometer : The Siphon Barometer consists of a tubebent in the form of a siphon, and is of the same diameter throughout. A graduated scale passes along the whole length of the tube, and the height of the barometer is ascentrained by taking the difference of the readings of the upper and lwer limbs respectively. This instrument may also be read by bringin...

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