He replied without a change in his peculiar posture.

“It is the widest distributed of all known elements,” he said, “and the easiest to isolate.... Anybody can make it and the material is before every door. I bid you observe how simple the process is.”

He removed his hand, drew forth a drawer in the table and took out a candle, an ordinary clay pipe and some green, little seed. He packed the seed into the pipe bowl with his thumb and set it above the flame.

Arnbush looked on, astonished.

The temperature of the night had changed. A faint premonition of the morning was on the way. There was a suggestion of chill entering through the window. And there was silence.

The dim flame of the gas jet overhead and the candle on the table threw a flickering arc of light about the pale hand, the clay pipe with its bowl of seed sitting in the flame, and the big, nearly naked, head extended toward them.

And while the distiller watched, there appeared, at the mouth end of the pipe stem, a drop of green. It lengthened and widened slowly until it hung there like a pear-shaped emerald.

The chemist removed the pipe from the flame of the candle.

“That is circine,” he said. “It is present in all vegetable life, especially in the seed. Any of the plants of the Ambrosia family are rich in it. I have used here the common green seed of the ragweed and a little heat.

“But I bid you mark that in this form the circine is not free. It is locked up in the molecule. If you tasted this drop of green, it would be bitter and have no effect. The circine is, as I have said, cased off in the molecule. It must be freed to have any virtue.”