In measuring land a chain called "Gunter's chain"

(fig. 398) is used. It consists of 100 links, each of which is 7.92 in. Ions 792 The whole chain is thus 792/12 = 66 ft. long = 22 yd. = 4 lineal poles or rods. A rod, pole, or perch is 5 1/2 yd. = 16 1/2 ft. And 1 ac. = 4 roods = 160 sq. rods, poles, or perches = 4840 sq. yd. = 43,560 sq. ft. One square mile = 5280 x 5280 sq. ft. = 640 ac. Again, 5280 ft. = 1760 yd. = 8 fur. = 1 m. = 80 chains. And 1 ac. = 10 sq. chains = 100,000 sq. links. One square pole or perch = 625 sq. links. Square links are easily reduced to acres by dividing by 100,000, or, in other words, marking off five figures from the right, and the result is the equivalent in acres and decimals of an acre. Thus, if the area be 387,564 links, by dividing by 100,000 we obtain 387564 ac. By multiplying the decimal figures by 4, and marking off, the roods will be found; and by multiplying the decimal figures in the roods by 40, the number of perches, poles, or rods will be found, and so on with the yards and feet. Thus 387,564 sq. links = 3 ac, 3 roods, 20 sq. poles, 30 sq. yd. 8 sq. ft.

Fig. 399. - Surveying Chains and Arrows.

MELONS GROWN FOR MARKET.

Photo. E. J. Geary.

At Mr. E. Rochford's Nursery.

Table Showing Number Of Links In From 1 To 100 Ft