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acid, or " choke-damp " ; in its third stage, it exhaled carburetted hydrogen, or 

 fire damp ; and lastly, having giving ofE all its gaseous contents, it was reduced 

 to anthracite, or stone-coal. He observed that the Coal-measures of the Forest 

 of Dean were composed of coal in the second stage. He then proceeded to explain 

 the means whereby these exhalations may be dissipated by the ventilation of 

 the mines, and exhibited an improved Davy lamp, and a model of an anemometer, 

 or gauge of the quantity of air passing through a mine. Mr. Mackworth's 

 explanations were remarkably lucid, and deUvered in a very pleasing and effective 

 manner. The address was much applauded. 



Mr. Atkinson produced, and explained, a series of plants illustrative of the 

 minin g operations in the Forest. 



The company separated at 7 P-m. ; the members of the Woolhope Club 

 making their way back to Ross, where they also separated. The Hereford 

 members reached this City at midnight, having spent a very instructive and 

 agreeable day. 



