574 Wisconsin Academy of Sciences , Arts , and Letters. 
Curvature of space, 242. 
Curves, harmonic, formulae for intersec¬ 
tions, 450. 
of three frequencies, 449, 452, 461. 
Lissajous’ 449, 452. 
stereoscopic photographs of, 449. 
Cyclas, 424 
CycJops and C. brevispinosus, 181, 208, 284, 
291, 306-319, 326-337, 351-9, 368-370, 
379-385,s393-6, 407-430, 441. 
fluviatilis, 204, 332. 
Leuckartii, 310, 326,330. 
oithonoides, 331. 
pulchellus, 326. 
Danes in America, bibliography of 39. 
census of, 42. 
churches, 13, 16. 
colonization scheme for, 26 
Grundtvigian, future of. 33. 
history of, 1. 
religious factions, 30. 
scattering of, 13. 
schools, 20,24. 
society to unite, 28. 
Daniells, W. W., 112. 
Dansk Folkesamfund, 28. 
Dante, freedom from monotony, 162. 
human interest of the poet, 158. 
originality of, 149, 156, 163. 
poetical justice, 161. 
quotations by, 149. 
religious quality, 156. 
style. 162. 
woman, types of, 161. 
Daphnia hyalina, 305-319, 335-340, 351-3, 
361-373, 383-397, 406-430, 443. 
Kahlbergiensis, 209, 301, 346. 
longiremis, 401, 422. 
pulicaria, 313-9, 340-5, 352, 362, 371, 379, 
385-8, 399, 413-427, 445. 
retrocurva, 312-317, 345-6, 358-9, 366. 402-7, 
445. 
Davis, J. J., 165. 
Delaplaine, George P., 522. 
Denmark, Grundtvigian schools in, 4. 
immigration from, 8. 
Diabase in road-making, 251. 
Diagrams, methods of making, Birge, 276, 
384-390. 
Diaphanosoma, 313, 347, 358, 403-9, 422-5, 
445-6. 
Diaptomus, 182, 191, 308-328, 353, 360,368-9, 
384, 393-4, 407-430, 439. 
Diatoma, 307, 318, 353. 
Diatoms, sinking of, 417. 
Dimensions, space of four, 243. 
Dinobryon, 181, 357. 
Diptera, 188. 
Dollar, history of the word, 269. 
Dredge for collecting Crustacea, Marsh, 
183. 
Earth, area, difference of, due to changing 
oblateness, 477. 
compressive movements, 497. 
contraction of, 476. 
nucleal, due to change of oblateness and 
of rotation, 478. 
from change of physical condition in in¬ 
terior, 478. 
epigene forces, action of, 474. 
interior, condition of, 475. 
lateral tension in crust, 482. 
liquefaction of rocks, 494. 
movements, 465. 
movements, rock structures resulting 
from, 506. 
oblateness, effects of change in, 485. 
Earth, orogenic movements, 487. 
rotation, effect of change, 485, on internal 
pressures, 477. 
tensile movements, 500. 
vulcanism in, 493; local, 501; and regional 
movements, 497, 500. 
Eaton, Edward D., 522. 
Electric arc lamp in chemical laboratory, 
115. 
Epischura, 332, 412, 422. 
lacustris, vertical distribution by sea¬ 
sons, 190. 
Equilibrium of continental and sea areas, 
469. 
isostatic, 513. 
Ergasilus, 333, 413-6. 
Errata, vi. 
Experiments with available road-making 
materials of southern Wisconsin, 249. 
Eudorina, 357. 
Euclid, parallel axiom of, 241, 247. 
Erosion in geology, 470. 
in the transformation of minerals, 510. 
Fillmore, John C., 119. 
Folk-songs, forms spontaneously assumed 
by, 119. 
Folk-songs, Navajo, 120; Omaha, 124. 
Food, affecting Crustacea, 419. 
Floral structure of some Gramineae, 109. 
Freezing of lake Mendota, 289. 
Fragillaria, 307, 318, 353. 
Fuller, Newton S., 526. 
Fungi, parasitic, of Wisconsin, 165. 
Geology, earth movements, 465. _ 
Geometry, non-Euclidian, principles of, 241. 
Germany, relation of government to rail¬ 
roads, 81. 
Glacial drift as road-making material, 250. 
Gloiotricliia, 352-7, 410. 
Government, municipal, use of parties in, 
225. 
Gramineae, floral structure of some, 109. 
Granite, crushed, for road-making, 252. 
Gravitation, effect on vertical distribution 
of Crustacea, 429. 
Gravity, power of, 512. 
Green Lake, 180. 
limnetic Crustacea of, 179. 
Gregory, John G., 94. 
Grundtvig, N. F. S., 2. 
Harmonic curves of three frequencies, 449, 
452, 461. 
plane, 454. 
Heterocope, 197. 
History, American, codfish in, 261. 
of the Danes in America, 1. 
Hosts of parasitic fungi, 165. 
Huntington, Ellsworth, 249. 
Hydrachnids, 302. 
Ice, in lake Mendota, thickness of, 289. 
Immigration from Denmark and Scandina¬ 
via, 8. 
Interior of the earth, condition of, 475. 
Isostacy, theory of, 469. 
Kinshon, Indian for “ Puritan,” 263. 
Lake, deep, 181. 
Green, limnetic Crustacea of, 179. 
Mendota (see Mendota). 
peculiar temperatures, 187. 
plankton studies, 221, 274. 
shallow, 181. 
