Summary: "Indelible pencils" or copying pencils were popular for a time in the 1870s because they made it possible to easily make copies of handwritten documents. Which would have been great — except they turned out to be poisonous. --- Support this podcast: <a href="https://podcasters.spotify.com/pod/show/letmegooglethat/support" rel="payment">https://podcasters.spotify.com/pod/show/letmegooglethat/support</a>
