276 PHILOSOPHICAL TRANSACTIONS. [aNNO 166Q, 



this city, repeated the experiment by infusing altering medicines into the vein 

 of the right arms of three persons, the one lame of the gout, the other ex- 

 tremely apoplectic, and the third reduced to extremity by that singular distem- 

 per, the plica polonica. The success of this, as Mons. Hevelius informs me, 

 was, that the gouty man found himself pretty well next day, and shortly after 

 went to work, it being harvest time, and has continued well ever since, leaving 

 -the hospital yesterday, and professing himself cured. The apoplectic patient 

 has not had one paroxysm since ; and the several sores which the plica polonica 

 had occasioned are healed ; and both these persons have been able to work at 

 any time these three weeks.* 



j4 further Account of the Mendip Mines. By Mr. Glanvil. 



N'' 39, p. 767.+ 



This gentleman says he has been informed by experienced miners to the fol- 

 lowing effect, viz. that the veins sometimes run up into the roots of trees, yet 

 they observed no difference at the top. The water is accounted healthy to 

 drink, and to dress meat with it. The snow and frost near the grooves melt 

 quickly ; but continue longer at a greater distance. Sometimes when a mine has 

 been very near the surface, the grass has been yellow and discoloured. Some 

 have made use of the virgula divinatoria ; but experienced workmen account it 

 of no value ; yet they say, when the mine is open they may guess by it how far 

 the vein leads. 



White, yellow, and mixed earth are leaders to the country, as they call it : 

 changeable colours always encourage their hopes. The stones are sometimes 

 12 fathoms deep before they are met with. Other times, when a stony reak is 

 at top, they meet ore just under the sward or superficies of the grass, which ore 

 has sometimes gone down above 40 fathoms. A black stone is of bad import, 

 as it leads to a jam, a black thick stone that hinders their work. A grey clear 

 dry one they account best. They seldom meet with damps. If in sinking they 

 come to wet moorish earth, they expect a jam, and to be closed up with rocks. 

 The nearness they guess by short brittle clay; for the tough is not leading. The 

 ore is sometimes shole, and sometimes 14 or 20 fathoms deep. They follow a 

 vein inclining to some depth, when it runs away in flat binns. When the 

 stones part it, then they find a vein again. Their draughts are 14 or J 6 fathoms, 

 till they come to a stone, where they cast aside a draught called a cut. Then 

 they sink plumb again 4 or 5 cuts, one under another. They find ore at 5Q 



* The public should have been told what the medicines employed in these experiments were. 

 f See the former account by this gentleman, in N° 28, p. 186 of this Abridgement. 



