Personally, I've found that font size (in pixels) plus 10 pixels is usually a good place to start for line height, and I've read anywhere from 65 to 90 characters per line for optimal reading. There have are actual scientific studies out there on the concept of line length and readability, but I don't have any immediately available.
[Edit] On the article itself: I'm no mathlete, but that whole thing smells like bullshit. I'm sure I (or, rather, someone good at math) could pick a number at random (pi, 42, etc) and come up with a formula to generate the same numbers. I'm not sure "right because the Golden Ratio" is a valid conclusion.
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Personally, I've found that font size (in pixels) plus 10 pixels is usually a good place to start for line height, and I've read anywhere from 65 to 90 characters per line for optimal reading. There have are actual scientific studies out there on the concept of line length and readability, but I don't have any immediately available.
[Edit] On the article itself: I'm no mathlete, but that whole thing smells like bullshit. I'm sure I (or, rather, someone good at math) could pick a number at random (pi, 42, etc) and come up with a formula to generate the same numbers. I'm not sure "right because the Golden Ratio" is a valid conclusion.