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Discussion of magnetic and meteorological observations made at Girard College Observatory, Philadelphia, in 1840, 1841, 1842, 1843, 1844, and 1845
| Location | Call # | Status |
|---|---|---|
| Joyner - Microforms B300 | CIS US EXEC MF SI106-11.4 | ✔ Available |
| Joyner - Microforms B300 | CIS US EXEC MF SI106-13.5 TO SI106-13.7 | ✔ Available |
| Joyner - Microforms B300 | CIS US EXEC MF SI106-14.2 | ✔ Available |
| Joyner - Microforms B300 | CIS US EXEC MF SI106-14.3 | ✔ Available |