of gold that goes into the furnace twelve ounces, if it comes out again eleven ounces, and the piece of silver which goes in twelve and comes out again eleven and two pennyweight, are just of the alloy of the standard of England.  If it comes out, either of them, either the gold above eleven, as very fine will sometimes within very little of what it went in, or the silver above eleven and two pennyweight, as that also will sometimes come out eleven and ten penny weight or more, they are so much above the goodness of the standard, and so they know what proportion of worse gold and silver to put to such a quantity of the bullion to bring it to the exact standard.  And on the contrary, [if] it comes out lighter, then such a weight is beneath the standard, and so requires such a proportion of fine metal to be put to the bullion to bring it to the standard, and this is the difference of good and bad, better and worse than the standard, and also the difference of standards, that of Seville being the best and that of Mexico worst, and I think they said none but Seville is better than ours.

2.  They melt it into long plates, which, if the mould do take ayre, then the plate is not of an equal heaviness in every part of it, as it often falls out.

3.  They draw these plates between rollers to bring them to an even thickness all along and every plate of the same thickness, and it is very strange how the drawing it twice easily between the rollers will make it as hot as fire, yet cannot touch it.

4.  They bring it to another pair of rollers, which they call adjusting it, which bring it to a greater exactness in its thickness than the first could be.

5.  They cut them into round pieces, which they do with the greatest ease, speed, and exactness in the world.

6.  They weigh these, and where they find any to be too heavy they file them, which they call sizeing them; or light, they lay them by, which is very seldom, but they are of a most exact weight, but however, in the melting, all parts by some accident not being close alike, now and then a difference will be, and, this filing being done, there shall not be any imaginable difference almost between the weight of forty of these against another forty chosen by chance out of all their heaps.

7.  These round pieces having been cut out of the plates, which in passing the rollers are bent, they are sometimes a little crooked or swelling out or sinking in, and therefore they have a way of clapping 100 or 2 together into an engine, which with a screw presses them so hard that they come out as flat as is possible.

8.  They blanch them.

9.  They mark the letters on the edges, which is kept as the great secret by Blondeau, who was not in the way, and so I did not speak with him to-day.