borough: Magnetic Variation in England in 1580

In jrnold/datums: Miscellaneous Data Sets

Description

William Borough's data for readings of the variation between magnetic and true north using the Sun's taken at different times of the day at the Limehouse lighthouse, not far from the Greenwich Meridian. These readings was published in A Discours of the Variation of the Campas, or Magneticall Needle.

Usage

borough

Format

A data frame with 9 rows and 4 columns.

name	type	description
elevation	"integer"	Elevation of the Sun in degrees
variation_am	"numeric"	Difference between the shadow of the Sun before noon and the compass north.
variation_pm	"numeric"	Difference between the shadow of the Sun after noon and the compass north.
variation_north	"numeric"	Variation between true and magnetic north.

Source

Stigler, Stephen M. The Seven Pillars of Statistical Wisdom, p. 20

References

Stigler, Stephen M. The Seven Pillars of Statistical Wisdom

See Also

gellibrand and db1668 for other datasets relevant to the history of the mean.

jrnold/datums documentation built on May 20, 2019, 1 a.m.