Sundials: Their Construction and Use (Anglais) Broché – 1 février 2000
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The other major feature of this book, interleaved with the first, gives detailed directions for making many kinds of sundial: wall-mounted, horizontal, and many more. The instructions show how to adapt dials to any northern longitude or latitude, giving time accurate to the minute. I imagine the dedicated reader could adapt the directions to the southern hemisphere, where the shadow's direction is reversed. The intermediate latitudes, between the tropics of cancer and capricorn, present interesting problems that I did not see addressed, however. In that equatorial band, the sun acts "northern" for part of the year and "southern" for the rest. I would have liked to see examples of how this challenge is overcome.
That's nit-picking, though. It's an approachable book with fascinating examples and clear instruction without daunting math. I recommend it to anyone interested in making sundials of their own, or who just want to know more about their history.
Suitable for the novice or experienced Sundialler.
Unfortunately most of the photographs
have not been very well reproduced.