SDL-50 - Build-it-yourself sundial for 50° north
The perfect way for youngsters to learn how to learn about the time we use
by Rob Walrecht
Description
A Sundial is an instrument to measure time – not to read it off. The time we use is based on the daily movement of the Sun, due to the rotation of the Earth.
A Sundial is therefore is the perfect way to learn about the time we use, which is so ‘normal’ for us but not so logical when you start learning about it.
Rob Walrecht’s BIY Sundial was designed for ages up to 15 years, in 1986. Since 2002 there is also an English design for 50° north.
The current Dutch design is the most modern of the three, with a folding line.
The Sundial is provided on 400 g cardboard, size 42 x 30 cm (A3), printed on one side, and with a folding line to fold it to size 21 x 30 cm (A4).
However, we can make any required design, for any latitude zone, in any language, in any size, shape and colours, and in any design.
This Sundial is designed for 50° north latitude, and can be used between roughly 40° and 60° north. This means in most of Europe and North Africa.
More Information
Bibliographic Information
- Orginal LanguageEnglish
- ISBN/Identifier 9789077052099
- Publication Country or regionNetherlands
- FormatOther
- Primary Price € 2.50
- Pages1
- Publish StatusPublished
- ResponsibilityRob Walrecht
- Edition1st
- Page sizeA3 (42 x 30 cm)
- IllustrationRob Walrecht
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