THE 



SCIENTIFIG PEOCEBDINGS 



OF THE 



EOYAL DUBLIN, SOCIETY. 



Vol. III. (New Series). JULY, 1881. Part III. 



CONTENTS. 



Page 

 IX. On Birds observed in Amelia County, Virginia. By Percy 



E, Freke, 61 



X. Description of the Instruments and Processes employed in 

 Photographing Ultra-Violet Spectra. By W. N. Hartley, 

 F.R.S.E., &c, Professor of Chemistry, Royal College of 

 Science, Dublin. Plates 12, 13, 14, and 15, . . . 93 

 XI. On the Thicknesses of the Irish Bedded Rocks. By G-. H. 

 KiNAHAN, M.R.I.A., President Royal Geological Society, 



Ireland. Plates 7 and 8, 108 



XII. Anniversary Address to the Royal Geological Society of 



Ireland. By G. H. Kinahan, M.R.I.A., President, . 109 



XIII. On the Composition of the Milk of Forty-two Cows. By 



Chakles a. Cameron, M.D., Fellow and Professor of 

 Chemistry, Royal College of Surgeons, Ireland, . . ] 25 



XIV. On the recent remarkable Subsidences of the Ground in the 



Salt Districts of Cheshire. By Professor Edward IIux-l, 

 LL.D., F.R.S., Director of the Geological Survey of 



.Ireland, I33 



XV. On the Identification of certain Localities mentioned in my 



Paper on the Diamonds of India. EyV. Baxi;,M.A.,F.G.S., 139 

 XVI. Concluding Note on the Manufacture of Paper from Molinia 



ccerulea. By W. Smith. C.E., . . . . . 141 



XVII. On the Origin and probable Structure of the Domite Moun- 

 tains of Central France. By Edward Hull, B.A., . 145 

 XVIII. Photographic Spectrum of Comet. By William Huggiks, 



D.C.L., F.R.S., «&c., y^ ^\\^<'i'^50 



The Authors alone are responsible Jbr all oplnkns expressed in their cdmmuniS^^X'. A 1 Q j } 



DUBLIN: 

 PUBLISHED BY THE HOYAL DUBLIN SOCIETY 



PRINTED BY ALEX. THOM & CO., 87, 88, & 89, ABBEY-STREET, 



THE queen's printing OFFICE. 

 FOR HEK MAJESTY'S STATIONERY OFFICE. 



1881. 



