Page:Philosophical Transactions - Volume 001.djvu/351

 (of which yet perhaps there is not so great danger, as one may imagine; as far as I could find by a Trial, I purposely made in a Groove, where I was sure, there wanted not Iron-Ore.) And what other wayes may be used to direct Miners without the help of a Load-stone?

43. How the Miners deal with the Rocks and, Sparrs, they often meet with, before they come at the Ore? Whether they use Fire to soften, calcine, or crack them? How they employ it, and with what measure of success?

44. What wayes and cautions they use, to free the Mine and secure the Work-men from the inconveniencies and danger accruing from the use of much fire in it?

45. What Instruments they use to break the Rock &c? And how those Instruments are conducive; and how long they last?

46. How the Mine-men Work; Whether naked or cloathed? And what Lights they use to work by; what materials they are made of, what measure of light they give; how long they last; and by what wayes they are kept burning in that thick and foggy air?

47. How Veins are follow'd, lost, and recover'd? And how several Miners work on the same Vein? And what is the best way of getting all the Ore in a Vein, and most conveniently?

48. How they convey out their Ore, and other things, that are to be carried out of the Mine? Whether they do it in Baskets drawn up by Ropes, or upon Mens backs; and if this last-named way; what kind of Vessels they use for matter, shape, and capacity? And whether the Work-men deliver them one to another? or the same Work-men carry them all the way? And whether the Diggers descend and ascend by Ladders of Wood, or of Ropes, &c.

About the Fifth Title.

49. Whether the Ore runs in a Vein; or lie dispers'd in scatter'd pieces; or be divided partly into a Vein, and partly into loose masses; or like a Wall between two Rocks, as it were in a Cleft; or be interspers'd in the firm Rock, like speckled Marble? Or be found in Grains like Sand or Gravel; as store Rh