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The Gods of the Elements · By
The Latin title is wrong.
"De deorum elementa" is not grammatical
"De deorum elementis" would mean "On the elements of the gods"
"On the gods of the elements" in Latin is "De deis elementorum" (or "De elementorum deis")
the -orum suffix corresponds to the plural genitive case and "de" requires the ablative case (-is suffix, for these plural nouns).