"The pH scale is like a seesaw. Anything on the left is going to have more H+ than OH-. That means it will be more acidic. The pH scale reflects this in smaller numbers. So greater [H+] is identified with a smaller number."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.