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ough he had discovered a lurking enemy.
He used the grindstone day after day in the same manner, and when it was noticed how he delighted in it, the Professor took one of the tools which had been ground and used it on a fine stone, to show how much keener the edge was made.
The saw was a marvel, and he tried it until he learned its use, and a line was drawn across the board, and when he failed to guide it the Professor smilingly corrected him, and he could not be induced to lay it aside until he had mastered the art of sawing along the line.
In the evening George again brought out the maps of the heavens and asked why he had made the band which was traced in curves on the two hemispheres.
"They show the course of the moon through the heavens, and in order to get the position, the mariner measures the degrees between the moon and the nearest fixed star."
"But if he hasn't any instrument to measure degrees, how can he tell how to make the calculation?"
"In that case he simply takes the yardstick of the heavens out of its box, and uses that as a measure."
"I never heard of such a thing before. Where is the box?"
"In the constellation Orion, which contains the most beautiful cluster of stars in the heavens, and is visible all over the inhabitable world, are four stars which form a parallelogram. See them on the map? Betelguese and Rigel, at the extreme opposite corners, are of the first magnitude, and the others that form the other corners are Bellatrix of the second and Saiph of the third magnitude. Two of the stars are in the northern and two in the southern hemisphere. Within the parallelogram thus formed, you will note three very bright stars in a line. These are exactly one degree apart, and is the yardstick the heavens are measured with."
Harry announced one morning that they had a new calf, and there was a rush of the boys down to the cattle range to welcome the newcomer. They had a fine herd, and seemed to be domesticated. From the time they acquired the first, of these animals there was always an abundance of milk, and that meant butter, a thing which was very welcome to Ralph and Tom.
Chief also enjoyed the luxury, but it was a remarkable thing that the savages had not anywhere in their observations utilized the herds which ranged to the north of them, and undoubtedly existed in the southern portions of the island. There was always plenty of beef on hand, and plenty of game was available whenever they had occasion to go for it, and their larder was well supplied with the wild vegetables, although they had to go considerable distances for them at times; but now that the garden was coming in they did not apprehend so much trouble in that direction.
There was one thing which none of them could understand in Chief. He would be seen frequently going over toward the forest, in the direction of the clay banks. He never tried to do this by stealth, but the Professor was anxious to ascertain the reason for it.
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