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JX..-^Iiemarks on a Vein of Lead found in the Carhomferous 

 Strata in Derby shire, near Whaley Bridge. By E. W. 

 BlNNEY, Esq. 



Read February 20, 1849. 



In a paper lately read by me before this Society, a de- 

 scription was given of a vein of barytes at Grimshaw Delph, 

 and allusion was there made to the fact, that mineral veins, 

 containing sulphuret of lead and other metals, had been 

 found in the Great Lancashire coal-field at several places ; 

 but that they were not common, and had seldom proved 

 sufficiently rich, so as to render them profitable enough for 

 working. The state of the satidstone rock at Grimshaw 

 Delph appeared to show, that it had been subjected to 

 considerable heat ; mention was also made of the circum- 

 stances of sulphurets of lead and zinc having been found in 

 druses, or hollows of ironstone nodules, occurring in coal 

 measures, which seemed to indicate that metals had in some 

 instances been precipitated from aqueous solutions, or segre- 

 gated from semi-fluid masses. As is well known, mineral 

 veins occur in rocks of all ages in different parts of the 

 world. Thus, the zechstein limestone of Germany, the 

 oolitic limestone of Austria, and many other secondary rocks, 

 contain them. With respect to their occurrence in the coal 

 measures, it is to be remarked that they have, in Lancashire 

 and the adjoining districts, been nearly always found in the 

 lower coal field, and generally in or about the position of 



