886 INDEX. 



E. 



Radiation of heat, I, 83 (see Tyndall). 



Retina of reptiles, 223 (see Hulke). 



Ross (Sir J. C), discussion of Magnetic Observations made under the direction of, 453 (see Sabine). 



Rotation of a free rigid body, 757, 767. 



S. 



Sabine (E.). Results of the Magnetic Observations at the Kew Observatory, No. III. — § 9. Lunar- 

 diurnal variation of the three magnetic elements, 441. 



Contributions to Terrestrial Magnetism, No. X., 453. 



Sea, depth of, deduced from the tides, 642, 655. 



Siemens (C. W.). On Uniform Rotation, 657. 



Spectra ofnebulm, 381. 



Sylvester (J. J.). On the Motion of a Rigid Body acted on by no external Forces, 757. 



T. 



Thylacoleo camifex, 73 (see Owen). 

 Tides of the Arctic Seas, 639 (see Haughton) . 

 Tschirnhausen's Transformation, 97. 



Tyndall (J.). Sixth Memoir on Radiation and Absorption. — Influence of Colour and Mechanical Con- 

 dition on Radiant Heat, 83. 

 On Calorescence, 1. 



V. 



Viscosity of air, S^c, 249 (see Maxwell). 



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