474 



Geological Society : — 



Ethylidine, Ethylene (olefiant gas). 

 C,H, 



Aldehyde . . 



Chloride of 

 ethylidine . 

 (Wurtz) 



Geuther . . . 



Chloracetine 

 of ethylidine 

 (Simpson) 



(Wurtz and Cj H, 

 FrapoUi) C, H, 



C4H,(?) 



C, II, CI, 



C,H3 0, 

 CJI^a 



C.H, 

 C 



0. 



Oxide cf ethylene. 

 Ether of glycol 

 (Wurtz). 



Dutch liquid. 



Diacetate of gly- 

 col (Wurtz). 



Chloracetine of 

 glycol 

 (Simpson). 



Not yet disco- 

 vered. 



Diethyl-glycol 

 (Wurtz). 



I am still studying the action of acids on glycol, and hope soon to 

 he able to communicate further results. 



.H3 0j^^ 



CI 



cji.o. 



C,H,C1, 

 C^ H3 o, 



cjiao: 



C.H,0. 



0„ 



C,H, 



CI 



}o, 



Ci CI 



Acetal ,^^f^, lo, .^^g'., 1 0, 



(Dobereiner) ^^^^^'> i ^^^^^^^ i 



GEOLOGICAL SOCIETY. 



[Continued from p. 236.] 



November 2, 1859. — Prof. J. Phillips, President in the Chair. 



The following communications were read : — 



1. " On the Passage-beds from the Upper Silurian Rocks into the 

 Lower Old Red Sandstone, at Ledbury, Herefordshire." By the 

 Rev. W. S. Symonds, F.G.S. 



In the cutting at the Ledbury Tunnel, on the Worcester and 

 Hereford Railway, a series of beds have been exposed, whicli range 

 from the Upper Silurian or Downton beds to the Old Red Sandstone, 

 including bluish-grey rock with fossil fish, crustaceans, and shells, 

 like those found in the railway -cutting and elsewhere near Ludlow. 

 The following is the ascending order of the beds observed : — 

 L Aymestry rock, with Pentamerus Knightii, &c. (10 feet). 2. Up- 

 per Ludlow rock, with Chonetes lata, &c. (140 feet) (The Ludlow 

 Bone-bed seems to be wanting here). 3. Downton bed, thin (9 feet), 

 with Lingula. 4 to 8. Red and mottled marls and thin sandstone 

 (210 feet), with Lingula and Pteraspis (}). 9. Grey shale and thin 

 grit (8 feet), with Cephalaspis and Pterygotus. 10 and 11. Purple 

 shales and thin sandstones (34 feet). 12. Grey marl, passing into 

 red and grey marl and bluish-grey rock (20 feet), with Auchen- 

 aspis, Plectroduif, Cephalaspis (.-'), Onchus, Pterygotus Ludensis, 

 Lingula, and a Lituite (?). These pass upwards conformably into a 

 series of red marls, with yellowish-grey and pink sandstone, con- 

 taining Pteraspis and Cephalaspis, and undoubtedly forming the base 

 of the Cornstone-series of the Old Red Sandstone. The author re- 



