The next No. of this Journal will be published on the first of Nov 



CONTENTS. 



XXIV. Mineralogical Notices. No. Ill, 



XXV. Notice of the Report on th§ Geology and Topography of 

 a portion of the Lake Superior Land District, by J. W. Fos* 

 TER and J, D. Whitney, - - - 



XXVL Effects of Lightning during a storm on the first of July, 



1S51, at Attleboro', Mass., by Mr. Henry Rice, 



XXVIL On the former Changes of the Alps ; by Sir Roderick 



Impey Mcrchison, V.P.R.S., - - - - ' - 



XXVIIL Observations on the Pendulurn Experiment ; by Rev. 

 C, S. Lyman^ - - - - - - - - 



Miscellaneous Notes from Europe ; by B. Silliman, Jr. : 

 1. Present condition of Vesuvius^2. Grotto del Cane and 



Lake 

 Tivoh'. 



Agnano. 



Page, 



153 



Art, XVIL Observations on the Pluton Geysers of California; 

 by Prof. Forest Shepherd, • - - 



XVIII, Report of Prof. Alexander D. Bache, Superintendent 

 of the United Slates Coast Survey, showing the progress of 



that work for the year ending October, 1850, - - - 158 



XIX, On Coral Reefs and Islands ; by James D. Dana, - 



XX. On the Flow of Elastic Fluids through Orifices ; with a sug- 

 gestion of a new method of determining the mutual relations 

 of Elastic Force, Temperature and Density in an Expand- 

 ing Fluid; by Eli W, Blake, - . 



XXI. Oa the Relation of the Chemical Constitution of Bodies to 

 Taste ; by Prof. E. N, Horsford, - - - 



XXIL Foucauk'^s Pendulum Experiment, * - - - - 200 



XXllL Note on Heteronomic Isomorphism ; by Jam^^s D. Dana, 204 

 . - - . 205 



222 



3. Sulphur Lake of the Campagna, near 

 4. Meteorological Observatory of Mount Vesuvius, 

 5. Light for Illumination obtained from the burning of Hy- 

 drogen, by M. Giliard, • - , . . 256- 



XXX. British Association, Twenty-first Meeting at Ipswich, July 2 : 



1. From the Address of Prof. Airy, the Astronomer Rovai, 



opening of the Meeting 



2. On Diamagnetism and 



ne-Crystallic Action ; by Dr. J. Tyndall. 

 of the Kew Magnetographs ; by Col. Sabine. 

 Ignorance of i'm 

 Whewell. 



3. Report 

 4. On 



general course of the Tides; 

 5. Observations on Atomic Volumes and Atomic 



Weights; by Prof. Dumas, 



egraph ; by F. C. Bake^^ell, 



6, On a Copvin^ Electric Tel* 



.- : ■ - . - 262-278 



SCIENTIFIC INTELLIGENCE- 



m 



Chemistry and Physics. — Crystalline form of the Rhorabohedral Metate : On the 

 Equivalent of Magnesium, by 3IM. R. F. Marchasb and Th. Scheer^R, -^^9- 

 New aietalj Donarium, ^0.— On Aridium, a new metal, by M. Uljlgren : 

 Bisaauib: Alkalies, 281, 



^ For reynainder qf Contents sec third page of Cover,) 



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