So I had to work all alone. At first I had a little laboratory,
but as my resources began to run out I had to conduct my
experiments in a wretched unfurnished room in Kentish Town, where
I slept at last on a straw mattress on the floor among all my
apparatus. The money simply flowed away. I grudged myself
everything except scientific appliances. I tried to keep things
going by a little teaching, but I am not a very good teacher, and
I have no university degree, nor very much education except in
chemistry, and I found I had to give a lot of time and labour for
precious little money. But I got nearer and nearer the thing.
Three years ago I settled the problem of the composition of the
flux, and got near the pressure by putting this flux of mine and a
certain carbon composition into a closed-up gun-barrel, filling up
with water, sealing tightly, and heating."
He paused.
"Rather risky," said I.
"Yes. It burst, and smashed all my windows and a lot of my
apparatus; but I got a kind of diamond powder nevertheless.
Following out the problem of getting a big pressure upon the molten
mixture from which the things were to crystallise, I hit upon some
researches of Daubree's at the Paris Laboratorie des Poudres et
Salpetres. He exploded dynamite in a tightly screwed steel
cylinder, too strong to burst, and I found he could crush rocks
into a muck not unlike the South African bed in which diamonds are
found.
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