'VI KN I'S. 



NUMBER LXXIV. 



Art. V1IL— Astronomical Observations on the Atmosphere 

 of the Rocky Mountains, ma. leal elevations of from 4,500 

 to 11,000 feet, in Utah and Wyoming Territories 'and 

 Colorado; by Henry Draper, 



IX.— Photographs of the Spectra of Venus and a Lyras ; by 

 Heney Draper, *_ 



X. — OnDinitiv; 



Peter Townsend Austen, '... 



XL— On some Points in connection with Vegetation ; by J. 



XII.— Orbit of the planet Urda "(167] i; by C. H. F. Peters 1 

 XIIL— Principles of Compensation in Chronometers ; by J. 



XIV.— Notes 'on the Vespertine Strata of Virginia and West 

 Virginia ; by William M. Fontaine, 1 



XV— On the Chemical compoMiion of the flesh of Hippoglos- 

 sus Amei-ieamts; bvli. II. Cm l tkmik v, .._. 1 



XVI.— Notice of Darwin on the Effects of Cross- and ^Self- 

 Fertilization in the Vegetable Kingdom; by Asa Gray 1 



XVII.— Note on Microdiscus speciosus ; by S W Ford ' 1 



XVIIL-On Water Courses upon Long Island; by Elias 



SCIENTIFIC INTELLIGENCE. 

 Chemistry and Physics. —Purification of Hydrogen gas, 146.— Hypovanadic Oi 

 and its Compounds, Crow: Pla , Xilson, 147.— Behai 



of Palladium in the Alcohol flame, TVohler : Two new I 

 Emodra from tat ,- N - and Waldsteijj 1 



— Phthaleins of T mdard Meter M G ' M 



"ecokefamfv. 1 -" Fog-Signals, Henry, 151.— The Sip] 



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