VOL. XVII.] PHILOSOPHICAL TRANSACTIONS. 537 



best ore, except God's Blessing, The gth work is called the Wide- Work, or 

 Thomas Hirn's work, wrought about 6o fathoms, and left a seam above 26 

 inches thick when the work was given over, of very good ore. The 1 0th work 

 is called Three Kings in Tilbiirthwait, being 3 works, and wrought above 40 

 fathoms a-piece, the seam being above 14 inches of very good ore, but a little 

 troubled with water, having no sump to draw it away ; but there is fall enough 

 to make one. These are all the works that have been wrought in Coniston- 

 fells. Most of the works here mentioned have small seams near the copper, of 

 a grey sort of ore in small threads. 



New places have been discovered lately, and never wrought in, and several 

 found this year, 3 in Torverwel, and about lO in other places, and all near within 

 two miles of the first work in Coniston- fell, and as hopeful as those that have 

 been wrought in. 



Edvardi Luidii apud Oxonienses Cimeliarchce ylshmoleani, ad Clariss. V. D. 

 Christophorum Hemmer, Epistola ; in qua agit de Lapidibus aliquot perpetud 

 Figurd donatis, quos nuperis annis in Oxoniensi el Ftcinis Agris adinvenit. 

 N° 200, p. 746. 



Observations on Cinnabar and Gunpowder. By Mr. Anth. Fan Leuwenhoech. 



N° 200, p. 754. 



Having exposed native cinnabar to a very strong fire, it soon began to move, 

 many small particles separating themselves from the rest, till they had crept into 

 a cooler place ; and notwithstanding the great weight of the cinnabar, several 

 considerable particles, as large as pins' heads, rose up from the fire, and got into 

 cooler places. When the heat was increased, the cinnabar began to evaporate, 

 a black smoke arising, made up of small globules. Examining it when cold, I 

 found several six-sided figures, such as are represented, pi. 12, fig. 6, A, of 

 which some were very regular, others not; they were of different sizes, some 

 of the size of a small sand, others 100 times less; some were of the fig. B. I 

 never found any of these figures in the cinnabar, till it had been exposed to a 

 strong fire, which separated them from it. Some part of the cinnabar that lay 

 next the fire appeared as C D ; some particles also were like E, others like F, 

 and some with several points and solid angles, as G H. Besides these figures, 

 .there was a blackish matter, which like smoke had been separated from the 

 cinnabai^ where I found a great number of exceedingly small globules of quick- 

 silver. 



When I burned the cinnabar in the open air, a flame arose very like that of 



VOL. III. 3 Z 



