[In Your Sagas] How do you handle the book & lab text trade?

And yet a mage 200 years later can translate an individual lab text, without any extant reference to that other experiment.

But I feel that the ability to generate a lab total of sufficient magnitude is needed because it is more than just a recipe, far more than shorthand.

We had a discussion about "alchemy vs chemistry" once upon a time that echoes similarly in my memory...

From that post, there are some helpful diagrams from actual alchemical texts - altho' these are from the 1600's, once everything had been codified and was made clear and orderly:

These diagrams should help clarify things:
THE SEPHIROTHIC TREE
Explanatory Figures
Helpful Tab III, outlining the Mysterium Magnum
Helpful Tab IV
A simple Animal spell
Figure 6, a nice summation

If you're still having trouble, I'll include one more diagram:
KEY TO THE GREAT PHILOSOPHICAL SECRET
aka "the Figure conteyning all the secrets of the Treatise both great & small"

The point is that it's not just a list of instructions like it's not just "mixing stuff together", it's not just a recipe that you just translate word for word - it's far more "arcane" than that (literally!), and far more obtuse than learning a simple substitution cypher.

Or at least it certainly can be. ysmv.