242 Intelligence and Miscellaneous Articles. 



furnished by Mr. Ussher's paper (Q. J. G. S. vol. xxxii. pp. 367 et 

 seq.), the author has arrived at the conclusion that the series of red 

 rocks between the Lias to the east of Seaton and the Carboniferous 

 of Devon, formerly described under the title of " New Red Sand- 

 stone," cover the period of geologic time which that term signified, 

 and that the lower members of the series belong, not to the Trias, 

 but to the Permian or Post-Carboniferous. 



He considered that at the base of the Budleigh-Salterton Pebble- 

 bed there is a physical break of as much significance as that be- 

 tween the Trias and the Permian of the Midlands. From this 

 point eastwards the Triassic system is represented by a series of 

 rocks quite comparable with the Bunter and Keuper of the Mid- 

 lands, the Bunter being here represented by the Middle Division 

 (about 200 feet thick) and the Upper Division of Prof. Hull. 



These pass under the basement sandstone-series of the Keuper 

 below High Peak and Peak Hills, are brought up again by faulting 

 at Sidmouth, and dip beneath the Keuper again east of the Sid, 

 from which point eastwards the whole Keuper Division is exposed, 

 with quite a normal facies, as seen in the Midlands, in Central 

 Germany (Thiiringen, Jena), and in the Neckar Valley. 



In the marls which underlie the Budleigh-Salterton Pebble-bed, 

 he recognized the equivalents of the Permian Marls of Warwick- 

 shire and Nottinghamshire, and of the Zechstein Marls of Germany. 

 These pass, by a gradual transition, through Sandstones, becoming 

 more and more brecciated, into the great brecciated series of Daw- 

 lish and Teignmouth, which were regarded as the equivalents of the 

 great Permian breccias of the west of England, of Ireland, and of 

 the Lower Bothliegendes of Germany. 



All the rocks below the Budleigh-Salterton Pebble-bed were 

 regarded as the assorted materials furnished by the detritus of the 

 palaeozoic mountain-region of Devon, Cornwall, and Brittany, and as 

 representing the waste and degradation of that region, deposited on 

 the mountain-flanks and in land-locked bays during Post-Carboni- 

 ferous times, the marls being compared with the Nyirok of the 

 Austrian geologists. 



XXIX. Intelligence and Miscellaneous Articles. 



AN EXPERIMENT ON THE EMISSION OF LIGHT BY IGNITED 

 BODIES. BY FERDINAND BRAUN. 



\ SMALL portion, a few square centimetres for instance, of any 

 -*-*- object of porcelain is coated with the ordinary black paint 

 used by painters on porcelain*, and is heated in a muffle closed 



* This is a mixture of several metallic oxides with a flux ; that is, an 

 easily fusible silicate or borate. It is rubbed to a soft paste with some 

 fresh oil of turpentine to which a little "thickening-oil" is added, and is 

 painted on with a brush. " Thickening-oil " is the name giveu by 

 porcelain-painters to the liquid which gradually creeps over the edge of a 

 vessel in which turpentine is exposed in the open air— it is probably a 

 hydrate of turpentine. 



