The first paragraph states the thesis that there's something about wind patterns in the northern hemisphere that make windmill directionality important.
The first paragraph also says:
> It is convenient to have all clock hands turn in the same direction, but it is an accident of history which direction that is.
Clockwise is not a random coin-flip of history. Ironically, clockwise is clockwise also because something about the northern hemisphere: the shadows on a sundial move clockwise in the northern hemisphere, so when europeans first started making clocks, they continued the sundial convention!
The first paragraph states the thesis that there's something about wind patterns in the northern hemisphere that make windmill directionality important.
The first paragraph also says:
> It is convenient to have all clock hands turn in the same direction, but it is an accident of history which direction that is.
Clockwise is not a random coin-flip of history. Ironically, clockwise is clockwise also because something about the northern hemisphere: the shadows on a sundial move clockwise in the northern hemisphere, so when europeans first started making clocks, they continued the sundial convention!