186 



PERMANENT PLANTATIONS. 



tances, there is a larger clear area around each tree. In 

 fig. 06, the square form, every tree stands in the corner 

 of a square, in the centre of, and equally distant from, 

 four otheis. In the quincunx, every tree stands in the 

 angle of a triangle of equal sides, and in the centre of, 

 and equally distant from, six others. Thus, in the latter, 



/ 10 20 30 40 SO 



Fig. 90. — SQUARE PLANTING. Fig. 97. — QUINCUNX PLANTING. 



there is a greater space left for the admission of light and 

 air, and trees so planted mny be at less distance than in 

 the other. The operation of planting is more compli- 

 cated than that of the square, the rows not being the 

 same distance apart as the trees are in the row. The 

 first thing to be done is to find the two measures. Sup- 

 pose, for instance, we propose to plant a plot of ground 

 one hundred feet square, and to have the trees twenty- 

 five feet apart every way, we make a triangle of wood, 

 A, 7?, D (fig. 97), each side of which is twenty-five feet ; 

 "we then measure tlie distance from the angle, _C, to the 

 center of the opposite side, at C, and this gives us the 

 distance between the rows, which will be about twenty- 

 one feet. This will be called the small measure j and 



