Nature, "1 



, 1921J 



September 29 



Index 



XXXV 



Crinoids : Studies in the Development of, Dr. Th. Morten- 

 sen, 132 ; The Embryology of. Dr. F. A. Bather, 132 



Crocodile River Iron Deposits, Nature and Origin of the, 

 P. A. Wagner, 795 



Cromer : An Early Chellean Palaeolithic Workshop-site at, 

 J. Reid Moir and others, 406 ; Flints Found at, Colour 

 of, W. J. L. Abbott, 599 



Croonian Lecture of the Royal Society, Dr. H. Head, 350 



Crop Production, The Chemistry of, Prof. T. B. Wood, loi 



Cryptogamic Diseases of Plants, The Use of Coloured 

 Screens for Fighting against, R. Lance, 447 



Crystal Measurement, Prof. H. Hilton, 605 



Crystalline : Medium, The Vibrations of a. Prof. H. Hilton, 

 189 ; Solids, The Influence of Physical Conditions on 

 the Velocity of Decomposition of Certain, C. N. 

 Hinshehvood and E. J. Bowen, 285 



Crystals : Biaxial, Conical Refraction in, Prof. C. V. 

 Raman, 747; in Schools, Practical Suggestions for the 

 Study of, T. V. Barker, 54 



Cuckoo, The Deposition of Eggs by a, E. Chance, 215 



Cultivated Plants, The Natural History of, 430 



Cup and Ring Markings : C. Carus-Wilson, 523 ; C; 

 Abbott, 652 ; C. Carus-Wilson, 715 



Currency-Bars, Iron, O. G. S. Crawford, 587 



Currents induced in a Cable by the Passage of a Mass 

 of Magnetic Material over it. The, E. S. Bieler, 574 



Curves : Introduction to the Theory of, 388 ; Pure Algebraic, 

 Prof. H. Hilton, 388 



Cushing Oil and Gas Field, Oklahoma, The, C. A. Beal, 

 216 



Cyanic .Acid and Urea, Syntheses of, by the Oxidation in 

 Alcoholic Ammoniacal Solution of Phenols and Alde- 

 hydes, R. Fosse and G. Laude, 191 



Cyclones, The Energy of. Prof G. von Hann, 11 



Cyrenaica : Geology of, i., Eocene Strata, G. Stefanini, 478 



Dairy Thermometers, The Origin of " Churning at 62° " 

 on, R. Hedger Wallace ; Pastorelli and Rapkin, Ltd. ; 

 Dr. W^. Goodwin, 268 ; A. C. Cossor and Son, 362 

 Dalton, John, L. J. Neville-PoUey, 678 ; and Atomic Symbols, 



Prof. M. Delacre, 440 

 Dame de I'^rable," " La, L. Siret, 215 

 Dangerous Drugs Act, 1920, Draft Regulations, 213 

 Dante, The Cosmology of. Dr. J. L. E. Dreyer, 428 

 Daphnia, Breeding E.xperiments with. Prof. W. E. Agar, 



245 



Darirno, or Protective Figures on Houses in British New- 

 Guinea, Dr. G. Landtman, 116 



Dark Nebulae, Dr. A. C. D. Crommelin, 464 



Datura, The Teratology of the Genus, Prof. G. B. Detoni, 

 92 



Dead, Celestial and Terrestrial Orientation of the. Prof. 

 H. J. Rose, 538 



DEATHS. 



Appellof (A), 114 



Blichfeldt (S. H.), 148 



Blomfield (Dr. J. E.), 721 



Blount (B.), 242 ; 306 



Blyth (A. Wynter), 213 



Bowditch (C. P.), 659 



Brooks (Prof. W. R.), 340 



Bruce (Dr. W. Ironside), 148 



Burnham (Prof. S. W.), 212 



Burroughs (J.), 148; 177 



Cameron (Sir Charles Alexander), 51 



Carpentier (J.), 790 



Cholodkovsky (Prof. N. A.), 820 



Clifton (Prof. R. B.), 18 



Cory (C. B.), 820 



Crocker (Prof. F. B.), 721 



Cushing (Dr. H. P.), 341 



Czaplicka (Miss), 466 



Dale (Sir Alfred W. W.), 790 



Dennett (R. E.), 434 ; 529 



Fernald (Prof. C. H.), 114 



Field (Dr. H. H.), 242 



Fisher (S.), 213 



Fowler (W. Warde), 528 



Gatehouse (T. E.), 2 13 



Grover (C), 20 



Harmand (Dr. J.), 341 



Hawkshaw (J. C), 20 



Herschel (Col. John), 466 



Hinds (Dr. J. 1. D.), 277 



Humbert (G.), 84 



Ijima (Prof. I.), 277 



Keith (J.), 51 



Kellas (Dr. A. M.), 498 ; 560 



Kikuchi (Baron T.), 83 



Ladd (Prof. G. T.), 755 



von Lang (Prof. V.), 597 



Le Sueur (H. R.), 658 



Lippmann (Prof. G.), 659 ; 788 



Longstaff (Dr. G. B.), 401 



Malloch (P. D.), 498 



Menzies (Prof. J. A.), 659 



Miall (Prof. L. C), 16-18 



Mills (Dr. E. J.), 306, 432 



Miyake (Prof. T.), 148 



Moulton (Lord), 50; 82 



Nathorst (Prof. A. G.), 112 



Odling (Prof. W.), 19 



Payn (H.), 242 



Perrier (Prof. E.), 721 ; 819 



Pye-Smith (Prof. R. J.), 178 



Ransom (H. B.), 114 



Reay (Lord), 720 



Reinold (Prof. A. W.), 242, 276 



Rolfe (R. A.), 242, 276 



Rolston (Capt. W. E.), 789 



Rosa (Prof. E. B.), 401, 465 



Rowell (Sirl Herbert B.), 658 



Savage (Sir George), 658 



Semon (Sir Felix), 50 



Shackleton (W.), 561 



Simmons (A. T.), 820 



Skiff (Dr. F. J. v.), 148 



Stone (Dr. W. E.), 721 



Taylor (W.), 721 



Thayer (A. H.), 596 



Varley (S. A.), 789 



Vernon (Dr. R. H.), 242 



Waldeyer (Prof. H. W. G. von), 368 



Webb (Sir Arthur Lewis), 114 



Whitney (Marv Watson), 20 



Wright (Dr. G. F.), 433 



Wrightson (Sir Thomas), 530 



Decapod Crustacea, Distribution of Copper in the Blood and 



" Liver " of the, R. Elmhirst and Dr. J. H. Paul, i.si ; 



Crustaceans, The Mouth-parts of Certain, L. A. Borra- 



daile, 509 

 Deformation and Force, Relation between. Dr. P. G. 



Nutting, 633 

 Dentistry, Operative, Principles and Practice of. Dr. J. S. 



Marshall. Fifth edition, 484 

 Desensitising Photographic Plates, A. and L. Lumifere and 



A. Seyewetz, 633 



Desmid Flora of a Small Area in East Devon, G. T. Harris, 



404 

 Des Moines, Iowa, Municipal Observatory at. Opening of 



the, 821 

 Dewalquea in the Core of the Bore made at Washing Bay, 



Co. Tyrone, The Occurrence of. Prof. T. Johnson and 



Miss J. G. Gilmore, 477 

 Dewey Decimal System. Extension of the, by the Radio 



Laboratory of the U.S. Bureau of Standards, 372 

 Diary, A Last, W. N. P. Barbellion, 743 

 Dictyokinesis in Germ-cells, or the Distribution of the 



Golgi Apparatus during Cell-division, R. J. Ludford 



and J, B. Gatenby, 509 

 Dielectrics, The Electrical Conductivity of Some, H. H. 



Poole, 253 

 Diffuse Radiation of the Sky compared with the direct Solar 



Radiation, J. Vallot, 446 

 Diffusion of certain Saturated Solutions, The Coefficient of, 



B. W. Clack, 445 



