In-depth report on 19th-century magnetic and meteorological observations
This volume presents a careful study of magnetic force measurements taken at the Girard College Observatory between 1840 and 1845. Readers will find detailed discussions of instrument design, temperature effects, and the methods used to calibrate readings against standard conditions. The work blends practical experimentation with analytical modeling to illuminate how temperature and equipment influence magnetic observations.
- Insights into the vertical and horizontal components of magnetic force, including how readings are adjusted for temperature.
- Monthly and diurnal data tables that track magnetic values alongside temperature, across multiple years.
- Explanations of calibration methods, including comparisons between instruments and the treatment of observing conditions.
- Diagrams and computed versus observed comparisons that illustrate how the data fit the proposed models.
Ideal for readers with an interest in the history of meteorology and magnetism, as well as those curious about 19th-century scientific methods and data analysis.