760 
, INDEX. 
S. 
Sabine (E.). A Comparison of the most notable Disturbances of the Magnetic Declination in 1858 and 
1859 at Kew and at Nertschinsk; preceded by a brief Retrospective View of the Progress of the 
Investigation into the Laws and Causes of the Magnetic Disturbances, 227. 
Scrolls, 559 (see Cayley). 
Spectra of the stars, &c., 413; of the nebulae, 437 (see Huggins). 
Spectra of some of the chemical elements, 139. 
Surfaces, skew, 559 (see Cayley). 
Sylvester (J. J.). Algebraical Researches, containing a disquisition on Newton’s Rule for the Discovery 
of Imaginary Roots, and an allied Rule applicable to a particular class of Equations, together with 
a complete invariantive determination of the character of the Roots of the General Equation of the 
fifth Degree, 579. (For Contents, see p. 666.) 
T. 
Tetrasodiphenyl, 720. 
Tyndall (J.). On the Absorption and Radiation of Heat by Gaseous and Liquid Matter.— Fourth 
Memoir, 201. — Absorption by gases at different thicknesses, 202 ; of heat already sifted by gaseous 
absorption, 206 ; dynamic radiation, 216. 
The Bakerian Lecture. Contributions to Molecular Physics. Being the Fifth 
Memoir of Researches on Radiant Heat, 327. (For Contents, see p. 327.) 
y. 
Vogt (C.). Conducting-power of Alloys, 167 (see Matthiessen). 
Water-lines, 369 (see Rankine). 
W. 
LONDON: 
POINTED BY TAYLOE AND FEANCIS, EED LION COTJET, FLEET STEEET. 
