122 REMARKS ON SURFACE TEMPERATURE. 



spots on the soutli wedtern coast. The extension of the use of glass will 

 enlarge the area for the ciilture of delicate plants and fruits ; but shelter 

 will still be important, for if the glass is transparent it will only lessen the 

 cooling power of radiation to the extent of 2 or 3 degrees ; the effects of 

 this in lowering the day temperature are, however, diminished through the 

 retention of heat by the body of air enclosed within the frames. 



Much might be said on the influences of the cold caused by this radia- 

 tion into space on the health of persons exposed to it, the more delicate 

 especially, but it is not within my scope to touch on medical topics. It may, 

 however, be suggested that the umbrella will serve at times for protection 

 against some ten extra degrees of frost, as it does against the sun and rain. 



Roman Eoads in the South of England — By Mr. Whitley. 



ME. WHITLEY j^resented to the Institution a Map showing 

 the course of the Eoman roads in the south of England, and 

 read an explanatory paper. The Maj) was a reduction from the 

 ordnance survey on which the Roman roads and stations are laid 

 down so far as they may at present be traced on the ground ; and 

 the connecting links and probable extensions were obtained from 

 other available sources ; the object being an endeavour to trace 

 the extension of the Koman occupation of the country westward, 

 and to lay the foundation for a more searching investigation to 

 identify the sites of Roman stations, and other remains in Devon 

 and Cornwall. In accordance with the Author's wishes the pub- 

 lication of the Map and Paper was deferred in order that the 

 inquiry might be rendered more complete. 



