Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
2 X d
Bohr 1 788
7810
7814
7813
7811
7816
784
783
785
G x 5.5
44.
der
az. tape -
hr. L of Tape -
strike
clip
clv.
sin. l X l = d.
elev x - (x-y)