The schoolmaster, with the savings of two laborious years, had treated himself to a fine large microscope. This instrument, in its mahogany case, occupied a place of honor on a side table. It was a world of wonder, a more than Aladdin's lamp to the children, who looked with joy to the occasions when the schoolmaster revealed to their wondering gaze its enchantments. Whenever the schoolmaster took a little key from his vest pocket and approached the sacred altar, where reposed the marvel, the children stowed their books under the blue desks, and fairly held their breath with expectation. Any one of them might have the honor of being summoned as officiating acolyte of the occasion.
On this afternoon the schoolmaster had a bowl of water and some small green weeds from the nearest pond. He put some of the green plant in a large, clear glass. As it floated, the children coming near to look, one by one saw that the plant seemed supplied with minute green sacs filled with air.
"Now, take your seats," said the master. "This is called a bladder-plant, from these wee, green bladders, whereby it floats. Listen, and Nathan will tell you what he sees. Nathan, come forward."
Nathan came gladly.
"Now, tell us what you see in the water, Nathan."
