Among the incidental operations are (a) the valuation of the bullion by weighing and assaying it; (b) " rating" the bullion, or calculating the amount of copper to be added to make up the standard alloy; (c) recovering the values from ground-up crucibles, ashes and floor sweepings (the Mint " sweep "); (d) assaying the melted bars; (e) " pyxing " the finished coin or selecting specimens to be weighed and assayed; (f) " telling " or counting the coin.
At intervals these coins are weighed and assayed by a jury of skilled persons and the results reported to the Crown.
By mixing assayed samples he is able to produce an opium containing uniformly 10% of morphia.
Concentrated filtrates were also assayed for biological activity on radish.
Ores containing gold or silver are almost invariably assayed in the dry way; that is, by fusion with appropriate fluxes and ultimate separation of the elements in the metallic form.
The mass is then packed into boxes all of one size, and a specimen of each again assayed, the mean of the whole being taken as the average.
This division of values brings us to the second point in his philosophy, his theory of what he called " vital series," by which he assayed to explain all life, action and thought.