The Scientific American Boy Part 20

[Ill.u.s.tration: Fig. 265. A Sail-rigged Raft.]

When we went up the river again we carried the oars with us, also the sail and mast belonging to our ice boat, as there was a good breeze blowing down-stream. Our second trip was more successful. The mast was stepped in a small but solid box nailed to the logs. In the top of this box a hole was cut for the mast to fit into and then the mast was braced with guy lines. We came down the river in fine style, steering straight for the opening in the dam, and just as we were about to shoot through Reddy and I plied the oars for all we were worth on the port (left) side so as to swing the raft around past the boulder. However, we didn't escape entirely without accident, for the raft rode up on a submerged ledge, dipping the starboard side clear under water and nearly tipping us over. But in a moment the raft had righted itself and we had smooth sailing for the rest of the way.

BUILDING THE LOG CABIN.

[Ill.u.s.tration: Fig. 266. Foundation Logs Notched.]

[Ill.u.s.tration: Fig. 267. Foundation Logs Fitted Together.]

[Ill.u.s.tration: Fig. 268. A Corner of the Log Wall.]

Our third expedition completed the number of logs we required for the log cabin. Two large 12-foot logs were chosen for the foundation logs at the front and rear of the building. The logs were flattened along the bottom so that they would have a firmer bearing on the ground, and particularly on the corners, where they rested on foundation stones.

Each log was now notched about a foot from the ends. The notches were 8 inches long and about 2 inches deep. Care was taken to place those on one log squarely opposite the notches on the other. A pair of 14-foot logs were now laid across the foundation logs and rolled along them until another half-turn would have dropped them into the notches (shown in Fig. 266). Then notches were cut in the 14-foot logs to correspond, so that when the final half-turn was given one notch would fit over the other, making a mortise joint (Fig. 267). When the side logs were in position notches were cut in their upper surface to receive a pair of 12-foot logs which were rolled onto them, notched and dropped into place. Then another pair of side logs were laid on, and so the work progressed. The notches in each log were cut to a depth equal to one-quarter the diameter of the log; that is, if the log was 8 inches in diameter the notch was made 2 inches deep, and if 6 inches in diameter it was cut to a depth of 1-1/2 inches. When the logs were laid in place no s.p.a.ce intervened between them, as will be clearly understood by reference to Fig. 268.

We found, after a few logs had been set in place, that our cabin was growing faster at one end than at the other. The trouble was that our logs were not of uniform diameter throughout, and we had been laying the b.u.t.t ends, which were larger, all at one end of the building. So we had to take down the logs and relay them with the b.u.t.t end of the front foundation log at one end and that of the rear foundation log at the other. Then the cross logs were laid on with their b.u.t.t ends on the small ends of the foundation logs. The next end logs were laid with their small ends on the b.u.t.t ends of the cross logs, and so on, taking care never to lay the b.u.t.t end of one log across the b.u.t.t end of another. In this way the walls were built up evenly to a height of 3 feet.

[Ill.u.s.tration: Fig. 269. Piece Cut Out to Admit Saw.]

We had planned to make a large open fireplace in the cabin, and this necessitated cutting an opening in the rear wall. But we did not want to cut the opening until the wall was built up to its full height lest it might buckle while the remainder of the logs were being placed in position. So we merely cut a piece out of the top log to make room for a saw when we were ready to cut the complete opening. As our fireplace was to be 5 feet in width, a 5-foot piece was cut out of the center of the log. Then the ends were supported by cleats nailed on each side, as shown in Fig. 269. This done the building was continued as before, but as the walls grew we found it more and more difficult to raise the logs to position. We could not lift them directly to the top of the wall, but had to roll them up on "skids"; that is, on a pair of 14-foot logs which were laid against the top of the wall. When the walls had reached a height of about 5 feet above the foundation logs, a length 4 feet 9 inches long was cut out of the top log to allow s.p.a.ce for sawing out the front door and window, and also a 30-inch piece was cut out for the side window. Cleats temporarily held the sawed ends of the logs, while the walls were carried on up to a height of a little over 6 feet from the foundation logs.

THE ROOF OF THE LOG CABIN.

[Ill.u.s.tration: Fig. 270. Skids]

Then we started laying the roof. A 16-foot log was now notched in place at each side, with its forward end projecting about 3 feet over the front of the cabin to form a shelter in front of the building. A pair of 12-foot logs were then laid in position. The next pair of 16-foot logs were laid about 20 inches in from the sides, and after a pair of the cross logs had been set in place a third pair of logs were laid about 40 inches from the sides. Finally, a single 16-foot log was set in place at the center, to serve as the ridge beam of the roof. The roof logs were all carefully tested to see if they were sound before we laid them in place, because we did not want to run any risk of the roof falling in, particularly in the winter time, when it would be heavily covered with snow. A chalk line was drawn from the ridge beam to the lower roof beam, and the cross logs were sawed off along this line, as indicated in Fig.

271. Several slabs were now procured and laid across the roof beams to serve as rafters. These rafters projected about 18 inches beyond the side walls of the cabin, so as to support the eaves. Over the rafters we laid a roofing of slabs, starting with the bottom and lapping them, as we had done on our tree house.

[Ill.u.s.tration: Fig. 271. How the Roof Logs were Laid.]

THE DOOR AND WINDOW FRAMES.

We were now ready to cut out and frame the doors and window openings.

The front window of the cabin was to be close beside the door, so we merely widened the door opening at the top to include the window opening as well (see Figs. 271 and 272). The door was made 2-1/2 feet wide, and was cut down to the foundation logs. The window opening was cut to a depth of 24 inches. Before sawing out the opening we wedged pieces of wood between the logs along the line we were to follow with the saw, so as to keep them in place. After the opening had been made a couple of stout boards were nailed to the sawed ends of the logs at each side, to hold them securely in place and make a suitable framing for the door.

The cleats were then removed. The foundation log and the one at the top of the opening were flattened, to serve as the sill and lintel of the door. Between the door and window a short post was wedged in place. This post was flattened on opposite sides, so that the door jamb could be nailed against it on one side and the window frame on the other. The side window was next cut out and framed. After it had been framed it measured 2 feet square.

[Ill.u.s.tration: Fig. 272. The Finished Roof.]

THE FIREPLACE.

Then came the task of building our fireplace. First we sawed out the opening, cutting right through the rear foundation log. Then we gathered from the river a large number of the flattest stones we could find. With these we planned to build the three outer walls of our chimney. But the question of getting mortar to bind the stones together bothered us for a while.

"If only we could find a bed of clay. Don't any of you know of one around here?" queried Bill.

But none of us remembered seeing any clay bed in the vicinity.

"If we were in south Jersey now," I said, "we could use some of that red mud they have down there. It sticks like the mischief to shoes and pant legs. I bet it would hold those stones together."

"Red mud? Why there's plenty of it over the hill, back of Lumberville,"

said Reddy. "All the roads over there are red shale roads, and I saw some red banks along the river when we went after the logs."

That was just what we wanted. The banks Reddy referred to turned out to be genuine red shale, and soon we had ferried several scow loads of the stuff down to Kite Island. When the shale was wet it made quite a sticky mortar. The foundations of the chimney were laid in a trench about 2 feet deep, and the side walls of the chimney were carried inside of the cabin and covered the ends of the logs at the chimney opening. The side walls extended outward a distance of 3 feet, where they were joined by the rear wall of the chimney.

THE PROPER WAY TO BUILD A STONE WALL.

In making our chimney we could not rely on the red shale to hold the stones as firmly as good lime mortar would, so we had to be careful that each stone, as it was laid, had a firm bearing. The stones were embedded in a thick layer of mud, and if they showed any tendency to teeter we propped them up by wedging small stones under them until they lay solid.

Another thing that we were very careful about was to "break joints"; that is, to keep the joints in each layer of the stones from coinciding with those in the next layer, above or below. To make sure of this we made it a point to lay a stone over each joint in the top of the wall and then to fill in the s.p.a.ce between the stones with smaller stones. In this way the wall was made very substantial.

[Ill.u.s.tration: Fig. 273. How to Build a Wall.]

When the masonry had been carried up to the top of the chimney opening, a heavy timber about 12 inches wide was laid across the walls close against the wall of the building. This was to support the fourth wall of the chimney, and so we flattened its upper surface. To prevent it from catching fire it was covered with a thick plastering of mud, and then to keep the mud from cracking and flaking off we procured a piece of tin and tacked it over the log. The tin also extended over the top log of the opening. Then we went on with the building of the chimney walls, carrying them up about a foot above the ridge of the roof. Our chimney was completed by paving the bottom with stones, well packed in mud and nicely smoothed off to make the hearth. The hearth extended about 18 inches into the cabin, and was framed with logs, as shown in Fig. 275.

THE FLOOR OF THE CABIN.

A number of logs were now laid on the ground to serve as floor beams.

Slabs were used for the floor. We had some trouble in making the floor perfectly even, because the floor beams were rather irregular, and a great deal of time was spent in smoothing the logs off to a common level. If we had the work to do over again we would have bought two or three planks and laid them on edge to support the flooring.

[Ill.u.s.tration: Fig. 274. Building the Chimney.]

[Ill.u.s.tration: Fig. 275. Section through the Fireplace.]

THE DOOR HINGES AND LATCH.

[Ill.u.s.tration: Fig. 276. The Door Hinges.]

[Ill.u.s.tration: Fig. 277. The Latch Guard.]

[Ill.u.s.tration: Fig. 278. Door Catch.]

A door was now constructed by battening together a number of slabs. In place of a hinge a hole was drilled into the sill and another into the lintel directly in line with it. Two sticks of wood were then whittled to fit snugly, but without jamming, into these holes. These sticks were then nailed to the inner face of the door, with their whittled ends projecting into the holes, forming pintles on which the door could turn.

A narrow strip of wood was nailed to the outer jamb for the door to close against. The latch consisted of a stick of wood, fastened to the door at one end with a nail. It hooked onto a catch whittled out of hard wood to the form ill.u.s.trated in Fig. 278, and nailed to the jamb. Then to keep the latch from dropping too far when the door was open, and to guide it when slammed against the catch, we whittled out a guard piece to the form ill.u.s.trated in Fig. 277, and nailed this to the door, with the latch projecting through the slot of the guard. A string was now fastened to the latch and pa.s.sed through a hole in the door. A block was tied to the end of the latch string to prevent it from slipping back through the hole; but at night, when we did not want to be molested by any intruders, we untied the block and drew in the latch string.

THE WINDOW SASH.

[Ill.u.s.tration: Fig. 279. The Latch.]

For our windows we made wooden sashes which fitted nicely into the window openings. A small hole was drilled through the sash at each side into the frame, and nails inserted in these holes held the sash in place, and served also as hinge pins for the sash to turn on. The sash could be taken out at any time by removing these nails. As we could not afford to use gla.s.s for our windows, we covered the sashes first with cloth, and later, when it occurred to us that in winter time it would be difficult to keep the cold air out, we used oiled paper.

BUNKS.

[Ill.u.s.tration: Fig. 280. Hinged Window Sash.]