"I do not doubt it," said Professor Farrago, gravely.
"What are the chemicals for—and the tank and hose attachment?"
"Think, Mr. Gilland."
"I can't; I'm almost stunned by what you tell me."
He laughed. "The rosium oxide and salts of strontium are to be dumped into the tank together. They'll effervesce, of course."
"Of course," I muttered.
"And I can throw a rose-colored spray over any object by the hose attachment, can't I?"
"Yes."
"Well, I tried it on a transparent jelly-fish and it became perfectly visible and of a beautiful rose-color: and I tried it on rock-crystal, and on glass, and on pure gelatine, and all became suffused with a delicate pink glow, which lasted for hours or minutes according to the substance.... Now you understand, don't you?"
"Yes; you want to see what sort of creature you have to deal with."