Seasonal-hour sundials on vertical and horizontal planes, with an explanation of the scratch dial

Annals of Science 50 (1):83-93 (1993)

Abstract
The true form of the seasonal-hour sundial, in both vertical and horizontal planes, has been calculated by spherical trigonometry and displayed with the aid of computer graphics. These grids are presented, and show that the hour lines are in fact shallow curves at sites not on the equator. The curvature becomes very apparent at latitudes exceeding 50°. The true seasonal-hour pattern for a vertical dial at a latitude of 52·6°N is compared with the equiangular scratch dial
Keywords No keywords specified (fix it)
Categories No categories specified
(categorize this paper)
DOI 10.1080/00033799300200131
Options
Edit this record
Mark as duplicate
Export citation
Find it on Scholar
Request removal from index
Revision history

Download options

Our Archive


Upload a copy of this paper     Check publisher's policy     Papers currently archived: 46,461
External links

Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
Through your library

References found in this work BETA

The Diagram of Unequal Hours.Margarida Archinard - 1990 - Annals of Science 47 (2):173-190.
Greek and Roman Sundials.Sharon Gibbs - 1978 - Revue d'Histoire des Sciences 31 (1):80-81.

Add more references

Citations of this work BETA

No citations found.

Add more citations

Similar books and articles

Altitude Sundials for Seasonal and Equal Hours.Allan A. Mills - 1996 - Annals of Science 53 (1):75-84.
The Illustration of the Horizontal-Vertical Illusion.Frank W. Finger & David K. Spelt - 1947 - Journal of Experimental Psychology 37 (3):243.
An Analysis of the "Vertical-Horizontal Illusion.".Teodor M. Künnapas - 1955 - Journal of Experimental Psychology 49 (2):134.
Basis of the Horizontal-Vertical Illusion.G. C. Avery & R. H. Day - 1969 - Journal of Experimental Psychology 81 (2):376.
Feminism and the Flat Law Theory.Margaret Davies - 2008 - Feminist Legal Studies 16 (3):281-304.
The Vertical-Horizontal Illusion and the Visual Field.Theodor M. Künnapas - 1957 - Journal of Experimental Psychology 53 (6):405.

Analytics

Added to PP index
2014-01-20

Total views
6 ( #1,000,353 of 2,286,455 )

Recent downloads (6 months)
2 ( #588,942 of 2,286,455 )

How can I increase my downloads?

Downloads

My notes

Sign in to use this feature