SCIENCE. — CONTENTS OF VOLUME IV 



Comment and criticism, 1, 31, 47, 77, 93, 109, 125. 141, 157, 221, 269, 301, 333, 349, 367, 395, 411, 427, 451, 467, 483, 507, 523 

 Letters to the editor, 3, 32, 49, 78, 94, 111, 126, 143, 159, 222, 270, 302, 334, 351, 368, 396, 412, 429, 452, 469, 484, 509, 524. 

 Notes and news, 25, 45, 73, 88, 106, 121, 139, 155, 186, 219, 263, 297, 329, 363, 381, 408, 423, 448, 464, 480, 502, 520, 537. 

 Science supplement, 383. 



LIST OF ILLUSTRATIONS . 



PAGE 



Adelaide peninsula, map showing position of, relative to 



Hudson Bay opposite 545 



Aeroplane, experiment with, atChalais-Meudon, 481; invent- 

 ed by Victor Tatin 482 



Africa, map of Joseph Thomson's explorations in eastern . 46 



Air, simple experiment for showing pressure of 265 



Almanack, Bickerstaff's Boston, titlepage of 495 



Amazon River, map of mouth of, 489; sketch on the Ilha 

 dos Porquinhos in, showing the uprooted trees, 490; 

 section of* a falling hank on, 490; shore of, washed by 



the pororoca 491 



Aurora, artificial 466 



Balloon, map of voyage, Aug. 7, 1884, in, 299; Renard and 

 Krebs, 330; map of voyage in, Aug. 9, 1884, 331; map 



of Tissandier's voyage, Nov. 9, 1884, in 532 



Barrande tablet 139 



Bentham, George, portrait and signature of 353 



Blake, deck of the, ready for dredging 402 



Bogosloff Island and Hague volcano 433 



Buoy, iron nun, 415; Courtenay's whistling, 416; Pintsch 



gas, 416; chart of stray, in the North Atlantic .... 417 

 Calendar, church, of the fourteenth century, 493; stone, 



Mexican 494 



Challenger, the dredging and sounding apparatus on board 

 the, 117; the relative positions of the ship, the messen- 

 ger-weights, the toggle, and the dredge at different stages 



of paying-out from 177 



Chelydra serpentina 37 



Circumpolar stations, chart of international . . opposite 370 



Cream-tester 576 



Crystallization sediments (2 figs.) 484, 485 



Cystophora cristata (5 figs.) 514, 515 



Diamond, the largest known . 299 



Dredge, Otbo Frederick Miiller, 146; the naturalist's deep- 

 sea, 146; the Challenger, 149; first form of the Blake, 

 149; Verrill rake, 150; Chester rake, 150; Benedict rake, 



151; ropes, comparative size of 401 



Dredging, Sigsbee's accumulator for deep-sea 403 



Drumlins (10 figs.) 418, 419, 420 



Earthquake measurements (4 figs.) 516, 517, 518 



Eclipse, map of solar, of March 16, 1885, 579; of Sept. 8, 



1885 579 



Electric-light circuits (2 figs.), 123, 124; showing use of 



storage-batteries in, 388 ; multiple-wire systems . . . 477 



Equatorial coude at the Paris observatory 102 



Fish-Hawk, hoisting and reeling engine of the U. S. fish- 

 commission steamer, 147; forward deck of the . . . 147 



Fly's foot (3 figs.) -.219 



G-em-engraving, the Wbite dental-engine applicable to . . 106 



G-lobigerina and Orbulina 171 



Grand Canon, diagram showing erosion of, 64; at the foot 



of the Toroweap opposite 68 



G-reely's party, map showing points visited by 90 



Hallauer, Octave, portrait and signature of 307 



Heavens, map of the opposite 580 



Hochstetter, Ferdinand von, portrait and signature of . . 471 



H6tel des Neuchatelois 360 



Hudson Strait, map of the north-western shores of . . . 220 



Hyla versicolor 38 



Igloo, implements of the (12 figs.) 82, 83, 84, 85 



Indian chopping-stone 529 



Insects, swarming 79 



Jouffroy, Marquis Claude de, statue of 300 



Kasa-an Bay, Cape Grindall, E. X N. 12 miles 561 



Korean curios (4 figs.) 173 



Kowak River, ice-cliffs on 551 



Laboratory, Harvard physiological, general plan of, 128; 

 half-story of, 129; interior of, 130; interrupter-case in, 



131; respiration apparatus in 132 



Lahontan lake-beds in Humboldt valley 65 



Lesley, J. P., portrait and signature of 191 



Mamrang Pass, overturned fold in the ......... 535 



PAGB 



Mask, Peruvian burial 11 



Mesogonistius chaetodon 338 



Microscope for class-room demonstration 541 



Mill, old stone, at Newport 513 



Moraine of the second glacial period, general map of the 



terminal 68 



Muscles, apparatus for measuring strength of 521 



Netschilluk Innuit (5 figs.) 543, 544; map showing distribu- 

 tion of, about Adelaide peninsula .... opposite 545 



Nicaragua canal, maps of opposite 434 



Ocean, bottom of, at a depth of 1,500 metres, 104; bottom 

 of, at a depth of 1,200 metres, 170 ; thermometric curves 

 and corresponding depths of the, 172; bed, profile of 



the, traversed by the Talisman 172 



Ojibwa net-float, 528; rat-arrow, 529; weights 528 



Paleozoic rocks in Belgium, restoration of a distorted region 



of 536 



Petals, the evolution of 52 



Phonograph, novel form of 124 



Photographic drop-shutter, speed of 454 



Plants, rotation experiments on germinating (7 figs.) . . 51, 52 

 Polar station, Danish international, at G-odthaab, Green- 

 land 475 



Porcupine, dredging arrangements at the stern of the British 



ship : 148 



Pot-hole found in a Pennsylvania coal-mine 560 



Rana sylvatica 38 



Rayleigh, Lord, portrait of 163 



Reservoir Butte, showing terraces of the Bonneville shore- 

 lines opposite 47 



Seal, hooded (5 figs.) 514, 515 



Selawik Lake, entrance to 553 



Selected illustrations from contemporary foreign journals: 

 diving-chamber for submarine exploration; Pic duMidi, 

 meteorological and chemical laboratory, on (2 views) ; 

 halo seen at Paris, March 25, 1884; vertical solar ray seen 

 at Paris, March 20, 1884; leaf-butterfly , — In No. 80. 



Sella, Quintino, portrait of 542 



Sieve, Verrill's cradle 404 



Solar system, chart of 583 



Spider towers, burrowing (3 figs.) 115 



Sudan and the Nile, map of opposite 456 



Sun, view of, prepared by the Harvard college observatory, 

 opposite 563; spot as seen June 30, 1883, 564: spot as 

 seen July 25, 1883, 565; and planets, relative size of, 

 582; dial, novel form of, 51 ; spots, two large (4 figs.) , 460, 461 



Tangles, Verrill's form of 228 



Telegraph cables, raising of (4 figs.) 439 



Temperature curves, showing the daily and annual ranges 



for various places in the United States 570 



Thermodynamics, diagram illustrating possible exception 



to second law of 



Thomson, Sir William, portrait of 431 



Thomson's kinetic theory of matter (2 figs.) 205 



Thought-transferrence, diagrams (5 figs.) 41, 42 



Time, diagram showing comparison of mean with solar, at 

 the several seasons of the year, 580; outline-map, with 



dials showing standard railway opposite 576 



Tornado, June 17, 1882, effect of, at Grinnell, Io 573 



Tornadoes of Feb. 19, 1883, map of the tracks of .... 572 

 Tracks of fossil elephant, 274; resembling the imprint of 

 human feet, 274; cross-section of impression of, 275; 



bird 275 



Trap, Sigsbee's gravitating 228 



Trawl, the beam, 225; the Blake, 226; wings, 227; safety- 

 hooks for attaching beam, to the drag-rope 403 



Umbra limi 337 



United States, map showing the divisions of the signal-ser- 

 vice, of standard time, and the mean annual isotherms 



in the 596 



Well, spouting oil 64 



Wurtz, Cbarles Adolph, portrait and signature of ... . 



