. The California fruits and how to grow them. A manual of methods which have yielded greatest success: with lists of varieties best adapted to the different districts of the state. Fruit-culture. 178 Running Lines for Ditches. of the land to be irrigated), and running up stream a line which has the inclination intended for the ditch. To stake out this line when no special hindrances are in the way, use a home-made leveling instrument constructed as fol- lows:— With sound, straight-edged lumber a triangle is made, as indicated in the slietch. The three pieces, A B, 6feet long, B C, 12 feet long
. The California fruits and how to grow them. A manual of methods which have yielded greatest success: with lists of varieties best adapted to the different districts of the state. Fruit-culture. 178 Running Lines for Ditches. of the land to be irrigated), and running up stream a line which has the inclination intended for the ditch. To stake out this line when no special hindrances are in the way, use a home-made leveling instrument constructed as fol- lows:— With sound, straight-edged lumber a triangle is made, as indicated in the slietch. The three pieces, A B, 6feet long, B C, 12 feet long, and C A, 4 feet long, are made fast to each other at A, B, and C. The board. A D, is fastened to the triangle at right angles to B C. Near A, on the board, A D, a plumb-line is made fast. The plumb, like a mason's plumb, hangs in a hole at /% so that when ^^ Z> is vertical, the string hangs very near the surface of the board, A D. B. A Home-made Leveling Instrument. It will be seen that when A D '\s exactly vertical, ^^ C is exactly hori- zontal, if the angles at D are true right angles. An ordinary carpenter's square used in the construction of the apparatus will insure sufficient accu- racy in the position of A D. In marking on the board, A D, however, the line in which the string of the plumb will hang when B C \s exactly horizontal, more care is required. Two pegs are driven, as far apart as B and C, for these points to rest on. The highest one is driven into the ground until the plumb-line follows about the center line of the board, A D. Having marked this position of the plumb-line, the triangle is reversed so that the end B rests on the peg where before we had the end C, and vice versa. Should the plumb-line be in a position at variance with the first one marked on the board, then the correct position for the B C horizontal will be exactly in the middle between the two found by the aid of the two pegs. It will frequently be found convenient to have a scale of feet
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfruitculture, bookyea
