“Jolly grind that jar bursting up, though,” said Philpot, with a troubled countenance.

“Why, wasn’t that part of the show-off?” asked Pilbury. “Part of the show-off! No!” exclaimed Philpot. “I thought it was the best part of it all,” said Cusack. “So did I. No end of a bust up it was.”

“You see,” said Philpot, solemnly, “what I ought to have done was to dilute the oxygen with a little air first, but you fellows flurried me so I forgot all about it.”

“Jolly glad you did, or we’d have missed the bust up,” said Cusack. “I say, can’t we try now? I know the way to do it quite well.”

But this proposal Philpot flatly declined to accede to, and could only appease their disappointment by promising to perform one other experiment for their benefit.

This was of rather an elaborate nature. The operator first placed in a saucer some stuff which he explained was iodine. On to this he poured from a small bottle which smelt uncommonly like smelling-salts a small quantity of liquid, and then proceeded to stir the concoction up.

The two students were not to be restrained from offering their services at this point, and Philpot yielded. After they had stirred to their hearts’ content, Philpot ordered them to desist and let it stand a bit.

This they consented to do, and occupied the interval in taking down and smelling all the bottles within reach, with a hardihood that frightened the wits out of poor Philpot.

“Look here,” he said, when presently Pilbury suddenly dropped one bottle with a crash to the floor, and began violently spitting and choking, “you promised you wouldn’t touch anything, and I’ll shut up if you go on fooling any more. Serves you right, Pil, so it does.”

It was some time before the unfortunate Pil recovered from the results of his unlucky experiment, and even when he did, the odours from the broken bottle were so offensive that the windows had to be opened wide before the atmosphere of the room became tolerable. It wouldn’t have taken so long, only it was deemed advisable to shut the door at the same time to prevent the smell getting outside and telling tales to the school at large.