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Spider, burrow of psalistaps, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider carrying cocoon, Dolomedes sexpunctatus, illustration from Henry Christopher McCook, "American Spiders and their Spinning
Spider, cocoon, from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider, cocoon of Argiope cophinaria, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 188
Spider, Epeira triaranea tent, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider laying foundation lines, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider, Lycosid mother with young on her back, image from Henry Christopher McCook, "American Spiders and their Spinningwork," 1
Spider net with fly, Hyptiotes, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider, snare of triangle spider, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider, tetragnatha, navigating lake by silken sails, image from Henry Christopher McCook, "American Spiders and their Spinningw
Spider web, illustration from Henry Christopher McCook, "American Spiders and their Spinningwork," 1889
Spider with captured locust, insular spider, illustration from Henry Christopher McCook, "American Spiders and their Spinningwor
Spinacea oleracea (Chenopodiaceae)
Spinacia oleracea (Chenopodiaceae)
Spinacia sp. (Chenopodiaceae)
Spink, Wesley W.
Spink, Wesley W.
Spink, Wesley W.
Spink, Wesley W.
Spink, Wesley W.
Spink, Wesley W.
Spink, Wesley W.
Spiraea vanhouttei
Spiral staircase inside a dorm on the UMD campus
Spiranthes cernua
Spiranthes cernua (Coccineorchis cernua)
Spirodela and Wolffia
Spirogya
Spirogyra, fruiting
Spirogyra, vegetative cell
Spivak, Walter A.
Spizizen, John
Sp. Junip. Hol pharmacy bottle
Splendid view of Emperor's Island, three smaller islands, and the hills beyond.
Split ply woolen camel belt
Sponge holder
Sponsor Pride!
Spoon
Spooner Hall. Morris Campus
Spore trapping data. (Box 1, Folder 27)
Sporting event
Sports crowd
Sports World, Dinkytown, Minneapolis, Minnesota
Spotted Mushroom, close-up
Sprague's set of 6 ear instruments with universal handle
Sprague's set of 6 ear instruments with universal handle
Spread city
Spread of rust from Barberry;  selected states and years. (Box 1, Folder 28)
Spring at San Lorenzo near Tehuacan
Spring at San Lorenzo near Tehuacan