IE and FireFox

I'm a newbie, and completely self-taught. So I'm having some issues!
I'm designing the site: https://www.theyellowzine.com.

One page, in particular, is giving me a SUPER hard time!

https://www.theyellowzine.com/crystal/crystal (and /crystal/crystal2,
/crystal/crystal3, /crystal/crystal4) shows up differently in IE and
FireFox. The text of the poems in FireFox is way too small, but the
coding makes it look fine in IE. Can anyone help? I have no clue how to
fix this!

Thanks,

Joe

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