Leith Hill Place, | Dorking.
Xperimt. 1. Measurement of depth of furrows at top and bottom of slope— Old ploughed land has been pasture at least 24 years. Field sloping in 2 directions, but much most along furrows. Measured by laying a straight rod across from ridge to ridge, and measuring distance from furrow to rod.2
| Furrow No 1:— (Jan 15th 1872) | ||
| Top. (before there is much slope) | 4 in | |
| middle of slope————— | 3 | |
| Bottom of slope (on flat) | 3 | |
| Furrow No 2:— | ||
| Top (nearly flat) | about | 3 |
| near top of slope | " | 4 |
| Middle | " | 3 |
| Bottom | " | 4 |
| Furrow No 3:— | ||
| Top.— | about | 3 |
| Nr. top of slope | " | 3 |
| Bottom | nearly | 3 |
| Furrow No 4:— | ||
| Top | abt. | 4 |
| Top of slope | " | 3 |
| Bottom | " | 3 |
It was impossible in above experiment to obtain very accurate results,— any little irregularities in the surface making all the difference. There were marks of draining-pipes running across furrows nr. top & bottom
Experimt. 2— Trenches dug one on ridge, one in trough of furrow side by side in same field on slope. Jan. 11th. Line of worm-mould very ill-defined— No apparent difference
Beginning of Feb. Two more trenches dug in same field on nearly flat ground along line of furrow.
Worm-line very ill-defined only to be seen by an occasional bit of charcoal. These are very rare, but form a sufficiently straight line I think to preclude chance
| worm-mould | 2—4 inches | |
| No 2 (furrow) | — — | 3—5 |
Experimt. 3. A sod dug out near top of steep slope in garden and at bottom. (Feb 6th.)
| Top worm-mould | 4 inches |
| Bottom—— | 5 |
Expt. 4 Worm mould on common near sqre. yard 3–4 in.
On terrace near sq yd. 33
Please cite as “DCP-LETT-8203,” in Ɛpsilon: The Charles Darwin Collection accessed on