CONTENTS. Vll 



Number 257. 



Page 



Art, XLIV. — Radiation of Atmospheric Air; by C. C. 



Hutchins 357 



XLV. — Atmospheric i*adiation of Heat and its Importance in 



Meteorology ; by C. Abbe 364' 



XLVI. — Experiments upon the Constitution of certain Micas 



and Chlorites; by F. W. Clarke and E. A.- Schneider 378 

 XLVIT. — Qualitative Separation and Detection of Strontium 



and Calcium by the Action of Amyl Alcohol on the 



Nitrates; by P. E. Browning 386 



XL VIII. — The Age and Origin of the Lafayette Formation ; 



by E. W. Hilgard ._- 389 



XLIX. — Influence of Swamp Waters in the Formation of the 



Phosphate Nodules of South Carolina; by C. L. Reese 402 

 L. — Plattnerite, and its Occurrence near Mullan, Idaho ; by 



W. S. Yeates ; with Crystallographic Notes, by E. F. 



Atres . - . 407 



LI. — Upper Silurian Strata near Penobscot Bay, Maine ; by 



W. W. Dodge and C. E. Beecher. With Map 412 



LII. — Zinc-bearing Spring Waters from Missouri ; by W. F. 



HlLLEBRAND ._.. 418 



LIII. — A Meteorite from Pennsylvania; by W. G. Owens. 423 



LIV. — Two Meteoric Irons ; by G. F. Kunz and E. Wein- 



schenk. With Plate XIII . 424 



LV. — The Molecular Masses of Dextrine and Gum Arabic as 

 determined by their Osmotic Pressures ; by C. E. Line- 

 barger 426 



Appendix. — LVI. — A New Order of Extinct Eocene Mam- 

 mals (Mesodactyla) ; by O. C. Marsh 445 



LVII. — Notice of New Reptiles from the Laramie Forma- 

 tion ; by O. C. Marsh . 449 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Physical Properties of Fluorine, MoiSSAN, 429. — Expan- 

 sion of Chlorine in Violet Light, Richardson: Dissociation of liquid Nitrogen 

 peroxide, Ostwald, 430. — New method of preparing Carbonyl sulphide, Nur- 

 icsan: Preparation and Properties of Caesium. Beketoff: Color of Cobalt- 

 Solutions, Etard, 431. — Method of showing Electrical Waves, Lecher: Per- 

 manent Magnetic Field, W. Hibbert: Dielectric Constant and Conductivity, 

 M. E. Booty: Aberration, Rayleigh, 432. — Kirchhoff's Law and the radiation 

 of Gases, E. Prin-gsheim, 433. 



Geology and Natural History. — Note on distribution of upturned Cretaceous beds of 

 Brit. America, G. M. Dawson, 433. — Preliminary Report on the Coal- deposits of 

 Missouri, A. Winslow : Baltimore, with an account of the Geology of its envi- 

 rons, Williams, 435.— Annuaire Geologique, L. Carez et H. Douville: Supple- 

 mentary Appendix to Travels amongst the Great Andes of the Equator, E. 

 Whymper: Concerning principles which accompany chlorophyll in leaves, 

 Etard: Structure of the ovule and the development of the embryo-sac in 

 Vincetoxicum, Chadveaud, 436. — Researches regarding the effect of leaf-re- 

 moval in the case of grape-vines, A. Muntz: The Italian Botanical Society, 437. 



Miscellaneous Scientific Intelligence. — Latitude Observations at Waikiki, on the 

 island of Oahu, Hawaiian Islands, 438. — National Academy of Sciences, 441. 



Obituary. — Sereno Watson, 441. 



