Page:Philosophical Transactions - Volume 001.djvu/355

 and examine the goodness of the Ore in small quantities?

71. Whether, when they working great, they use to melt the Ore with any Flux or Additaments, or only by the force of the Fire, or in any way between both? (As throwing in of Charcoals when they melt Iron-stone does not only serve to feed the Fire, but perhaps by the Alchaly of its Ashes to promote the fusior: so Lime-stone, &c.)

72. What kind of Furnaces they use, to melt the Ore in? Whether they be all of one sort and bigness, or of differing?

73. What are, the Situation, Materials, Dimensions, Shape, Bigness, and in short what is the whole structure and Contrivance of the Furnace? If there be any thing peculiar and remarkable? What Tools are used in Smelting, their Figures, use, &c. And the whole manner of working?

74. What kinds of Fewel, and what quantities of it, are wont to be employed in the Furnace, within the compass of a day, or week? How much is put in at a time? How often it is renewed? And how much Ore in a determinate time, as a week or a day, is wont to be reduced to Metal?

75. In case an Additament be employed, what that is, and in what proportion it is added? Whether it be mingled with the Ore, before that be put into the Fire, or call in afterwards; and, if so, at what time, &c?

78. Whether the Ore be melted by a Wind, excited by the Fire it self; as in Wind-ovens? Ore by the Course of Waters? Or acuated by the blast of Bellows; and if so, whether these Bellows be mov'd by a Wheel, turn'd by Water running under it, or falling on it? And what are, the Dimensions, Situation, &c. of the Bellows?

79. What contrivance they have, to let or take out the Metal, that is in fusion; and cast it into Barrs, Sows, Pigs. &c?

80. What Clay, Sand, or Mould they let it run or pour it through? And after what manner they refrigerate it?

81. Whether or no they do, either to facilitate the fusion, or to obtain the more or better Metal, mingle differing sorts or degrees of Ore of the same metal? (As in some places 'tis usual, to mingle poor and rich Ore; and at Mendip they mix two or more of those differing kinds of Lead-ore that they call Frim-ore, Steel-ore, Potern-ore, &c.) Rh