CONTENTS OF VOLUME XXX. 



NUMBER CLXXXI. 



Page 



Art. I. — Observations on Invisible Heat-Spectra and the 

 recognition of hitherto unmeasured Wave-lengths ; 'by 

 S. P. Langley. With Plates I to IV, 1 



II. — Botanical Necrology of 1885 ; by Asa Gray, 12 



III. — The Isoclynamic Surfaces of the Compound Pendulum ; 



byF. E. Nipher, . 22 



IV. — The Peridotites of the " Cortlandt Series" on the Hud- 

 son River near Peekskill, N. Y.; by G. H. Williams,. . . 26 



V. — Description of a Meteorite from Green County, Tenn.; 



by W. P. Blake, 41 



VI. — Tendril Movements in Cucurbita maxima and C. Pepo ; 



by D. P. Penhallow. With Plate V, 46 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — A new Magnesium Carbonate, Engel : Chlorine monox- 

 ide, Garzarolli-Thernlackh and Schacherl, 57. — Lupanine, the alkaloid of 

 Lupine, Hagen: Relation between Molecular Structure and Light-absorption, 

 Hartley, 58. — Variation of Refractive Indices with Temperature. Dufet, 59. — 

 Oo a Spectroscopic Optometer, Zenger, 60. — Magnetization by an Electric Dis- 

 charge, Claverie, 61. — Telocity of Light in Air and refractive media, New- 

 comb, 62. — Theoretische Optik, gegriindet auf das Bessel-Sellmeir'sche Princip, 

 E. Ketteler, 64. — Magnetic and electrical properties of the iron carburets, 

 C. Barus and V. Strouhal, 67.— Joseph Henry and the Magnetic Telegraph, 



E. N. Dickerson : " The Force Function in Crystals," A. Elnhorn, 69. 



Geology and Mineralogy.- — The Missouri Coteau and its Moraines, J. E. Todd, 69. 

 — Geological Survey of Pennsylvania, J. P. Lesley, State Geologist, 70. — Atlas 

 von China, Orographische und Geologische Karten, F. F. Von Richthofen: 

 Swedish Geological Survey: Earliest (Devonian) winged Insects of America, 

 S. H. Scudder, 71. — Footprints on the Triassic Sandstone of New Jersey, J. 

 Eyerman: Cervus Americanus in "Warren Co., New Jersey: Pteropod of the 

 St. John Group: Annuaire Geologique TJniversel et Guide du Geologie, Dr. 

 Dagincourt, 72. — Chlamydoselachus anguiueus, S. Garman: South Carolina, 

 Resources and population, etc.: Kobellite from Colorado, H. F. and H. A. Kel- 

 lar, 73. — Crystallographic Notes, 0. W. Huntington: Mineralogical Notes, G. 



F. Kunz, 74.— A Mt. Blanc Fulgurite, 77.— Fifth Annual Report of the State 

 Mineralogist of California, H. G. Hanks, 78. 



Botany. — Manual of the Botany of the Rocky Mountain Region, J. M. Coulter, 

 76. — Sir Joseph Hooker, 77. 



Astronomy. — Meteors of November 27, 1885, 78. 



Obituary. — Dr. John Christopher Draper, 80. 



