TY  - JOUR
T1  - Extract of a Letter from Mr. Humphry Marshall, of West Bradford, in Chester County, Pennsylvania, to Dr. Franklin, Sent with Sketches of the Solar Spots, Dated May 3, 1773
JF  - Philosophical Transactions (1683-1775)
VL  - 64
SP  - 194
EP  - 195
PY  - 1774/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1774.0026
M3  - doi:10.1098/rstl.1774.0026
AU  - Marshall, H.
ER  -