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On some of the minor Fluctuations in the Temperature of the Human Body 

 when at rest, and their Cause. By A. H. Garrod, St. John's College, 

 Cambridge 419 



Observations of the Absolute Direction and Intensity of Terrestrial Mag- 

 netism at Bombay. By Charles Chambers, Superintendent of the Colaba 

 Observatory 426 



On the Un eliminated Instrumental Error in the Observations of Magnetic 

 Dip. By Charles Chambers, Superintendent of the Government Observa- 

 tory, Bombay 427 



On the Laws and Principles concerned in the Aggregation of Blood-cor- 

 puscles both within and without the vessels. By Richard Xorris, M.D., 

 Professor of Physiology, Queen's College, Birniinghani 429 



Researches on Turacine, an Animal Pigment containing Copper. By A. 

 W. Church, M.A. Oxon., Professor of Chemistry in the Royal Agricul- 

 tural College, Cirencester 436 



On the Radiation of Heat from the Moon. By the Earl of Rosse, F.R.S. . . 430 



On a new arrangement of Binocular Spectrum Microscope. By William 

 Crookes, F.R^S. &c 443 



On some Optical Phenomena of Opals. By William Crookes, F.R.S. &c. . . 448 



Researches on Gaseous Spectra in relation to the Physical Constitution of 

 the Sun, Stars, and Nebulae. — Second Note. By E. Frankland, F.R.S., 

 and J. N. Lockyer, F.R.S 453 



On the Molar Teeth, lower Jaw, of Macrauchenia patacJionica, Ow. By 

 Professor Owen, F.R.S 4-54 



Researches into the Chemical Constitution of the Opium Bases. — Part L 

 On the Action of Hydrochloric Acid on Morphia. By Augustus Matthies- 

 sen, F.R.S., Lecturer on Chemistry in St. Bartholomew's Hospital, and 

 C. R, A. Wright, B.Sc 455 



Researches into the Constitution of the Opium Bases. — Part II. On the 

 Action of Hydrochloric Acid on Codeia. By Augustus Matthiessen, 

 F.R.S., Lecturer on Chemistry in St. Bartholomew's Hospital, and 0. R. 

 A. Wright, B.Sc 460 



A Preliminary Investigation into the Laws regulating the Peaks and Hol- 

 lows, as exhibited in the Kew Magnetic Curves for the first two years of 

 their production, By Balfour Stewart, LL.D., F.R.S., Superintendent of 

 the Kew Observatory 462 



On a new Astronomical Clock, and a Pendulum Governor for Uniform Mo- 

 tion. By Sir William Thomson, LL.D., F.R.S 468 



Note on Professor Sylvester's representation of the Motion of a free rigid 

 Body by that of a material Ellipsoid rolling on a rough Plane. By the 

 Rev. N. M. Ferrers, Fellow and Tutor of Caius College, Cambridge .... 471 



On the origin of a Cyclone. By Henry F. Blanford, F.G.S., Meteorological 

 Reporter to the Government" of Bengal . 472 



