I have found that the centre of a drawing on one folio appears to have meaningful ratios embedded it in it. I expect that they might be trigonometric, but I wonder if you’d care to comment.

Here’s the image

https://voynichimagery.files.wordpress.com/2013/03/f57v-centre-measures.jpg

If you’d care to comment, either here or on the blogpost

https://voynichimagery.wordpress.com/2013/03/19/f57v-a-little-more-on-mathematics-and-geodesy/

I’d appreciate it.

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