836 



INDEX. 



the Composition of the Sea-Water associated 

 with the Blue Muds on the Floor of the Ocean, 

 481. Specific Gravity of Mud-Waters, 484. Al- 

 bumenoid and Saline Nitrogen in Mud- Waters, 

 484. Reactions in Blue Muds, and the Ad- 

 mixture of Mud- Waters with Sea- Waters, 495. 

 Murray ( John), LL.D., and Irvine (Robert), F.C.S. 

 On the Manganese Oxides and Manganese 

 Nodules in Marine Deposits, 721. The Ores 

 of Manganese, 724. Manganese Dioxide in 

 Suspension, 725. Manganese in Mud- Water, 

 726. Manganese in the Marine Deposits of the 

 Clyde Sea-Area, 729. Manganese Deposits in 

 the Deep Sea, 735. Theories concerning the 

 Origin of Manganese Nodules in Marine 

 Deposits, 740. 



N 



Natica, a gasteropod (fossil), 709. 



Neuropteris (fossil), 325, 588. 



Newton (E. T.), and Sharman (G.). Note on some 

 Fossils from Seymour Island in the Antarctic 

 Regions, obtained by Dr Donald, 707. 



Nitrates, Effect of, On the Estimation of Nitrogen, 

 755. 



Nova Aurirjce, on the New Star in the Constellation 

 Auriga. By Professor Ralph Copeland, 51. 



Observations of the Bright Lines of the Spec- 

 trum of Nova Aurigse, made at Dunecht. By 

 Dr L. Becker, 53. 







Odontopteris (fossil), 330, 592. 



Parallelepiped, Partition of, into Tetrahedra, the Cor- 

 ners of which coincide with Corners of the 

 Parallelepiped, 711. 



Paton (D. Noel), M.D. On the Action of the 

 Valves of the Mammalian Heart, 179. Position 

 of Valves in Ventricular Diastole, 184. Latent 

 Period, Right Ventricle, 185 ; Left Ventricle, 187. 

 Period of Expulsion, 187. Period of Residual 

 Contraction, Right Ventricle, 187 ; Left Ven- 

 tricle, 188. Aortic and Pulmonary Valves, 193. 



Pecopteris (fossil), 332, 593. 



Permutations. See under Algebra. 



PhUageria Veitchii, 207. 



Pilatus, Mount, Number of Dust Particles at, 638. 



Pinnularin (fossil), 357, 613. 



Pole (William). On the Present State of Know- 

 ledge and Opinion in regard to Colour-Blind- 

 ness, 441. Part I. — Scope of the Inquiry, 442. 

 Part II. — Relations between Dichromic Colour 

 Sensations and those of Normal Vision, 448. 

 Part III. — Variations in Dichromic Vision, 458. 

 Part IV. — General Statements and Opinions, 

 464. Part V. — Summary of Conclusions, 472. 



Projectile, Rotating Spherical, Path of. By Professor 

 P. G. Tait, 427. 



Pterygotus, 515. 



R 



Baia batis, or Common Skate, Sensory Canals of. 



By Professor J. C. Ewart and J. C. Mitchell, 



B.Sc, 87. 

 Renaultia, 586. 

 Rhabdocarpus (fossil), 355. 

 Ribes Culverwelli, 229. 

 Rigi Kulm, Number of Dust Particles at, 626, 629, 



632, 635, 637. 

 Rotating S%>herical Projectile, The Path of. By 



Professor P. G. Tait, 427. 



S 



Saxifraga Andreiosii, 232. 



Sea- Water. Chemical Changes of the Sea- Water 

 associated with the Blue Muds on the Floor of 

 the Ocean. By John Murray, LL.D., and 

 Robert Irvine, F.C.S., 481. 



Sebasic Acid, Products from, 373. 



Seymour Island Fossils, Note on. By G. Sharman 

 and E. T. Newton, 707. 



Shark. See Greenland Shark. 



Sharman (G.) and Newton (E. T.). Note on some 

 Fossils from Seymour Island, in the Antarctic 

 Regions, obtained by Dr Donald, 707. 



Sigillaria (fossil), 345, 605. 



Skate (the Common), Raia batis, Sensory Canals of. 

 By Professor J. C. Ewart and J. C. Mitchell, 

 B.Sc, 87. 



Slimonia (fossil), 510. 



Soil, Chemical and Bacteriological Examination of, 

 with Special Reference to the Soil of Grave- 

 yards. By James Buchanan Young, M.B., 

 D.Sc, 759. 



South Wales Coal Field, Fossil Flora of. The Re- 

 lationship of its Strata to the Somerset and 

 Bristol Coal Field. By Robert Kibston, 565. 



Sphenophylleae (fossil), 332, 597. 



Sphenopteris (fossil), 320, 585. 



