If an alchemist took a multiclass wizard dedication, could he keep both formulas and spells in the same book? Their descriptions appear to be identical, and until reaching the 100-page limit that would really help with the bulk limit. I suspect that the RAW are silent on this, but it seems reasonable.
It's for one of my players, whose alchemist chose to have 8 STR. I don't want to make life too easy for this aged weakling, but this seems like something he should be able to do.
Edit: Actually, after a quick search, I see somebody beat me to this question. The answer seems to be as I suspected - RAW, they are two different things. Home games, the DM can allow a reasonable combination.