Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
Upper rocks begin with bottom
layer 14 inches thick
from bottom up including the
14" ledge is 4 1/2 rocks.
67/2
12|72"
6 ft.
On top 50 in of quarried rock to
first thin chart 2"
15 in of quarried rock to
second thin chart 2 1/2 - 3"
13 in of quarried rock to
third chart, 1/2 - 1 in H.
1 foot of more with consider
the chart dropped a top, using
a foot mass of chart.
Onward from me the joint
below first chart layers.