ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] ABOUT forty years ago I learnt a formula which I have used ever since. It was 7x = 4y2; x = height of observer in feet, y = distance of horizon in miles. I do not now know where I found this formula, but it will be seen, if a few examples are worked out, that it agrees very ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/092425d0
Permalink