188 PROCEEDINGS OF THE ACADEMY OF [1892, 



near and scattered over the fields for the distance of two miles Avest 

 of the bridge. 



On the liill seventy-five yards west of the old Black Horse Tav- 

 ern in East Bradford Townshi]) (in the road) there is a compact 

 talc of a very fine quality which was exposed some four feet in 

 length by two and a half inches in thickness. This appears to 

 occupy fissures in the hornblende rocks along which there has 

 been a motion of the adjacent parts evidenced by the slickensided 

 surfaces of this talc. 



In Newlin Township, five miles southwest from the Black Horse 

 locality, there is a large outcrop of serpentine in which numerous 

 lumps of corundum have been found, one of them, lying on the 

 surface, weighed 5,200 pounds. On the north side of the ridge a 

 number of excavations have been made from which several tons 

 have been taken in small pieces. In one of thetu was found a vein 

 or stratum fourteen feet long by seven feet in breadth and fifty-four 

 feet in* depth, a solid mass of corundum and emerylite ; on one side 

 of it was a coating of diaspore, three by two feet and two inches 

 thick, well crystallized on the surface, some of the crystals being 

 two inches long. The other minerals found there were lesleyite, 

 pattersonite, gibbsite, indianite, antigorite and spinel. The locality 

 of corundum was first discovered by the digging of a well on the 

 hill south of this, the crystals being found in a decomposed albite. 

 The well was re-opened in 1844 for corundum but was found unpro- 

 ductive and was discontinued after going down fifty feet. Since 

 then a shaft has been sunk near by to the depth of one hundred 

 and fifty feet, with considerable drifting on a vein, and a number 

 of tons of mineral taken out, said to be from a true vein or stratum. 

 This is now worked by a Philadelphia company, Avith success. 



On the same ridge of serpentine, 500 yards east, a quarry of feld- 

 spar was opened and several carloads of it sent to the potteries at 

 Trenton. It was highly cleavable and furnished many fine cabinet 

 specimens, also large crystals of tourmaline, garnets and muscovite. 

 One half mile east of the corundum locality, at the end of the 

 ridge of serpentine, crystals of beryl of green and yellow colors 

 were found abundantly in the soil ; one terminated crystal weighed 

 fifty-one pounds. This appeared to come from a vein of quartz and 

 mica in the serpentine. 



A short distance southwest from the corundum works a shaft has 

 been sunk and a few tons of the mineral taken out. When first 



