Water, earth and air

[nablator]

... or, as in this case, the element air.

I don't think the cloud-band represents the element "air".

This subject was discussed many times... Astrology associations signs - planets - elements are clearly represented by symbols in manuscripts as in the Saturn image posted by eggyk.

Biblical creation drawings in manuscripts also symbolize the air element with a cloudband.
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The astrological symbols for planets and elements were adopted in the 2nd half of the 15th century in (mostly printed) astronomy books.

In Sacrobosco's De Sphaera manuscripts the spheres were named but drawn without symbols but in some later printed editions the symbols are clearly drawn, for example in the You are not allowed to view links. Register or Login to view..