818 
INDEX. 
Roberts (W.). Studies on Biogenesis, 457. — Introduction, 457 ; on the sterilization by heat of organic 
liquids and mixtures, 458 ; on the capacity of the juices and tissues of animals and plants to generate 
Bacteria and Torulce -without extraneous infection, 465 ■; on the bearing of tbe facts adduced on the 
origin of Bacteria and Torulce, and on the real explanation of some of the alleged cases of abiogenesis, 
471 ; conclusions, 475. 
Roberts (W. C.) and Lockyer (J. N.) (see Lockyer). 
Roscoe (H. E.). On a Self-recording Method of Measuring the Total Intensity of the Chemical Action 
of Total Daylight, 655. 
S. 
Screws, application of theory of, to the dynamics of a rigid body, 15. 
Skull, development of, in the Pig, 289. 
Sound, aerial reflection of, 194; aerial echoes, 197 ; stoppage of, by aerial reflection, 195, 202 ; action 
of hail and rain on, 205; of snow, 207 ; of fog, 184, 209, 214, 216 ; of wind, 224. 
Spectra of calcium, strontium, and barium, map of, 809. 
Spectral lines, application of, to quantitative analysis, 481, 495 ; photographs of, 484; coincidences in, 
discussed, 487; reversal of, 807 (see Lockyer, and Lockyer and Roberts). 
Spottiswoode (W.). On his Contact Problems, 705 (see Clifford). 
Sthenurus, 265. 
Sun, spectrum of, 479, 805 ; new elements in, 490. 
Syren, steam-, use of, as fog-signal, 186 &c. 
T. 
Thomson (Sir W.). Note on Mr. Gore’s paper on Electrotorsion, 560. 
Thomson (W.). On the Echinoidea of the ‘Porcupine’ Deep-sea Dredging-Expeditions, 719. 
Tyndall (J.). On the Atmosphere as a Vehicle of Sound, 183 (for contents see p. 244). 
W. 
Williamson (W. C.). On the Organization of the Fossil Plants of the Coal-measures. — Part V. 
Aster ophyllites, 41. — Description of the plates, 77. 
On the Organization of the Fossil Plants of the Coal-measures. — Part VI. 
Ferns, 675. — Description of the plates, 700. 
Winds of Northern India, 563. 
LONDON: 
FEINTED BY TAYLOE AND FEANCIS, EED LION COUET, FLEET STEEET. 
