Photo: Michael Hession. Most important, this pencil feels great in my hand. Many cheap plastic mechanical pencils appear easily breakable (some have cracked on me!) and are too thin to hold ...

Get some 0.5mm solder and a .5mm mechanical pencil and you're most of the way there. Remove the eraser, empty all the graphite out of the pencil, and carefully thread the solder into the pencil.

How the genetic code was cracked, with paper and pencil and no computers June 13, 2020 More than 5 years ago A compilation of data contributing to the genetic code.