“There are three ways, neither of which is practicable,” continued the carpenter. “You can’t plane off a circular face, and the saw or the hatchet would leave the work in a rough state. We will use all three of the methods named. First we will saw off the corner; then we will cut away a little more with the hatchet or shave; and finally we will plane it off smoothly, though we shall not use a plane, but another tool for the purpose. Mark off the part you will saw from the board, and saw it off.”

This was done without any aid from the teacher.

Then shingling-hatchets were used to take off the two corners left by the saw.

“Now we will introduce you to the spokeshave, an exceedingly useful tool for many purposes. It does the same work as a plane, and in the same manner; but as it has no appreciable length, compared with a plane, we can follow curves with it. Put the corner of the board in the vise, and then with the spokeshave work down to the circular line. Don’t cut the mark off; never do that. It will take you some time to do this job.”

Mr. Brookbine showed the workmen how to use the new tool; and they went to work with it in earnest, being greatly interested in their occupation. While they were thus engaged, the carpenter went to the door to ascertain the state of things at the tree where one of the class was taking a vacation. Tom lay at the foot of the tree, and Dick Short was seated on a limb twenty feet from the ground. If the prisoner moved, the dog looked up at him; and Dick could think of no strategy by which he could outwit the faithful sentinel. The instructor only looked, and then returned to the bench. Dick was likely to stay where he was until the St. Bernard changed his quarters.

“Use the try-square when you get near the mark,” said the carpenter, as he resumed his place. “Every part of the quarter circle must be true.”

One after another the students carried the shelf to Mr. Brookbine, as they finished it. Some criticisms were made on the work, and some of it had to be corrected. In due time they were all completed and approved. The sides of the shelves were just as they came from the planing-machine; and the boys were directed to lay them on the bench, and use the smoothing-plane upon them. These planes were adjusted so they cut the thinnest possible shaving. The shelves were made as smooth as glass.

“I don’t see how we are to put the shelves up,” said Ben Ludlow when the boards were finished.

“That is just the river we are to cross next,” replied Mr. Brookbine. “I believe we have no iron brackets, though I dare say the machinists at the other end of the shop could make them for us if we are willing to wait for them. For the want of them we will make a couple of ogee brackets of pine for each shelf.”

“Ogee!” exclaimed Steve Baxter. “Is that Latin?”