The laboratory and its inventory

Algebra
Book magic and other questionable reasons for action
The great work
The Potens and his fortune
The Shriyantra vs. a world view from facts
The card index box as the one book for everything
The spatula, the crucible and its support
Get an agent for yourself
Geometry
Materials science and materials exploration
Only the non-aid alone is supposed to be irreplaceable
Shelf, table and chair
Toys like in Africa
Different test setups
Complete clarity
From a person's eligibility to concern
Preserving broken pieces
Numbers and characters
Time to live vs. lifetime
Double purified gold