Absolute Anime

In one of the episodes from the anime he talks about how he writes his research in code like marcoh's "cookbook" ] and he says what he calls it. What is the name of the book, what is the name of roy mustangs research, and what episode is it from. I have been trying to remember and i can't for the life of me If you know what it is you will be awesome forever. Thanks

Let me see if I understood what you're asking...
you want to know what they call their researches?? I mean, what code they use??

Ed uses travel's memos as a code and Roy uses girl's names as a code.

I don't know if that's what you were asking, but I don't think this was showed on the old anime. I read that on the manga, i dont remember exactly in which volume it was.