" These experiments were made at his
country residence. I was staying there for the night. So next morning
I got down before him, went at my experiment, saturated 8 oz. of acid
(and a nice smell I made) out in the grounds, treated it afterward by
division into four parts, filtered and crystallized it, all as before,
with the result that I obtained 23/4 oz., as against his 31/2 oz.--or in
the proportion of 271/2 cwt. of salt to the ton of acid, as against his
321/2 cwt.
I now thought of business. "What is the royalty to be?" I said, as we
sat at breakfast. This we settled as we Scotch say "in a crack," or as
an Englishman would say "in a jiffy." Mr. Croll decided to have the
apparatus put up on a manufacturing scale here in Glasgow; and I
determined to erect similar apparatus at one of my gas works.
I dare say that it will be uppermost in your minds, Whence comes the
increased yield of salts? Well, I will state one fact, and leave you
to ruminate on it, namely, by Mr. Croll's process we did not seem to
produce any sulphureted hydrogen.
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