It came up in a recent game of mine that a cleric found an alchemist's formula book. He used Read Magic, and I ruled he found out what a few of the spells were (he only wanted to know what types of spells there were, not specifics).
But I began to think. Alchemy is basically chemistry (only with magic) so would he have to make, I don't know, a Craft (Alchemy) check instead (or even in addition to) Read Magic?