Aldrich, Thomas Bailey, 1836-1907 · Boston, CT : Hall and Locke · leaf 296
ned, andthe fragmentswere nowfound at from 4 to 5 inches beneath the surface. Sothat in this interval of 6^ years, about 1| inch of mouldhad been added to the superficial layer. I am surprisedthat a greater quantity had not been brought up dur-ing the whole 21i years, for in the closely… … FlG. 1. Section of the vegetable mould in a field, drainedand reclaimed fifteen years previously ; a, turf;6, vegetable mould without any stones ; c, mouldwith fragments of burnt marl, coal cinders, andpebbles; d, sub-soil of black, peaty sand withquartz pebbles. 268 A Book of Natural History…
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