500 LOWER OOLITIC ROCKS OF ENGLAND: 
Manganese Ore. Great Oolite, Bath. (R. Warrington, Jun., Quart. 
Joum. Chem. Soc., Ser. 2, vol. iii. p. 206.) 
Melanterite (Copperas). Hydrated sulphate of Iron, Fuller's Earth, 
Widcombe, near Bath. (T. M. Hall, op. cit.) 
Vaiwdium. Found by Riley in pig-iron of Northamptonshire. 
(J. A. Phillips, Elements of Metallurgy, Ed. 3, by H. Bauerrnan, 
1891, p. 130.) 
