Mechanical Pencil Month – Day 17: Slide rules, OK?
Another Slide Rule Saturday rolls around (whatever happened to the last one?) and having already used up my only slide rule pencil as well as my only pencil with slide…
Mechanical Pencil Month – Day 12: Twelve leads a-leaping
For the twelfth day of Christmas Mechanical Pencil Month, I present a whistlestop tour of twelve lead refills from my collection of [insert large number here]. They have been arranged…