"Thank heaven, they don't!"
"I wonder what a scientific chemist would say, if he were asked to identify two organic mixtures in an hour and a half!"
"I did it in half an hour."
"Yes, but how? By tasting, and guessing, and adding I in KI, or perchloride of iron."
Lucy helped herself to more potato.
"I seem to have heard these sentiments before," she said.
Mona laughed. "Yes; and you are in a fair way to hear them pretty frequently again, unless you keep out of my way for the next four months."
"Did you go into the dissecting-room?"
"Yes; and what do you think I found them dissecting?"
"Anything new?"