CONTENTS OF VOL. VI 



(FOURTH SERIES.) 



NUMBER XXXVI.— JULY 1853. 



Page 



The Marchioness of Hastings on the Tertiary Beds of Hord- 



well, Hampshire 1 



Mr. E. W. Davy on some new Methods of forming the Nitron 



prussides 11 



Mr. J. J. Sylvester's Note on a remarkable Modification of 

 Sturm's Theorem, and on a New Rule for finding Superior 



and Inferior Limits to the Roots of an Equation 14 



Mr. W. Stevenson's Abstract of Observations on the Aurora, 



Cirri, &c. made at Dunse 20 



Mr. R. Adie on the Electrical Currents induced in the Metallic 



Cross 46 



Mr. A. Dick's Analysis of Hayesine 50 



Dr. M. Baumert on a new Oxide of Hydrogen, and its relation 



to Ozone. (With a Plate.) 51 



Proceedings of the Royal Society , , . 63 



Cambridge Philosophical Society 69 



On the Application of Photography to the study of certain Phe- 

 nomena of Polarization, by Mr. W. Crookes " 73 



On the Combustion of Ammonia, &c. by the green Oxide of 



Chromium, by the Rev. J. E. Ashby, B.A., F.R.A.S 77 



Additional Observations on Catalytic Combustion , . . . . 77 



On Sun Columns observed at Sandwick Manse, Orkney, by the 



Rev. C. Clouston 78 



Meteorological Observations for May 1853 79 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 London ; by Mr. Veall at Boston ; and by the Rev. C. 

 Clouston at Sandwick Manse, Orkney. ..„....,. 80 



NUMBER XXXVIL— AUGUST. 



The Rev. S. Haughton on the Reflexion of Polarized Light 

 from the Surface of Transparent Bodies 81 



Dr. Wrightson on the Atomic Weight and Constitution of the 

 Alcohols ,. .. 88 



Mr. A, Cayley's Note on the Porism of the in- and- circumscribed 

 Polygon 99 



Mr. A. Cayley's Note on the Integral 



fdx-?- V{m~x)(x+a)(x+b)(x+c), 103 



