Talk:Bifilar sundial

Vertical declining bifilar dial
The next challenge is to write the section on vertical declining bifilar dials. We have a link to Collin's paper- all we need to do is to translate it- keeping the terminology and symbols consistent with the section on Michnik's horizontal dials, ans BSS glossary. Who wants the first go? -- Clem Rutter (talk) 18:26, 12 February 2015 (UTC)