Category: Tutorials
-
Stretch Vacumatic patent
Johannes Iversen patented the “Stretch Vacumatic” filling system for fountain pens in 1939 in the USA. I’ve made a posting that describes how to repair such a pen which can...
-
Colliding worlds…
I love it when my worlds collide like this. Root 2 is a number that I use almost daily, since a gain of root 2 is a gain of approximately...