This 2022 episode covers the development of penicillin, which started – but definitely did not end – with the chance discovery of some mold in a petri dish.

 

This 2022 episode covers the development of penicillin, which started &ndash; but definitely did not end &ndash; with the chance discovery of some mold in a petri dish.
&nbsp;

Join Holly and Tracy as they bring you the greatest and strangest Stuff You Missed In History Class in this podcast by iHeartRadio.

Stuff You Missed in History Class

Listen to this collection of top episodes from iHeartRadio and iHeartPodcasts. 

Listen to this collection of top episodes from iHeartRadio and iHeartPodcasts.&nbsp;

Podcasts from iHeartRadio

SYMHC Classics: Penicillin

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/356a333a-70f6-45ac-bb41-b4830156b3c6/transcript

This 2018 episode covers the Battle of Amiens, near the end of World War I. It was the start of what came to be known as the 100 Days Offensive, which was the Allies’ final push to win the war. 

This 2018 episode covers the Battle of Amiens, near the end of World War I. It was the start of what came to be known as the 100 Days Offensive, which was the Allies&rsquo; final push to win the war.&nbsp;

SYMHC Classics: Battle of Amiens 

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/6814a6df-11f4-47ab-b232-b49f016c5f78/transcript

Tracy and Holly talk about experiences in intensely hot weather. Holly shares how moved she was by Samuel Plimsoll’s obituaries.

Tracy and Holly talk about experiences in intensely hot weather. Holly shares how moved she was by Samuel Plimsoll&rsquo;s obituaries.

Behind the Scenes Minis: Air Conditioned Rabble Rouser

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/05642099-38ed-4308-96e4-b49d01551c7f/transcript

Samuel Plimsoll was an advocate for better working conditions for sailors, and for a lot of other things. A lot of contemporary accounts refer to him as an agitator.

Research:
Bibby, Miriam. “Samuel Plimsoll and the Plimsoll Line.” Historic UK. June 14, 2024. https://www.historic-uk.com/HistoryUK/HistoryofBritain/Samuel-Plimsoll-Line/
Britannica Editors. "Samuel Plimsoll". Encyclopedia Britannica, 30 May. 2026, https://www.britannica.com/biography/Samuel-Plimsoll
“Death of Mr. Samuel Plimsoll.” The Lichfield Mercury. June 4, 1898. https://www.newspapers.com/image/797510210/?match=1&terms=%22samuel%20plimsoll%22
“Friends of Humanity.” Democrat and Chronicle. Apr 27, 1913. https://www.newspapers.com/image/135735684/?match=1&terms=%22samuel%20plimsoll%22
Glover, William. “Samuel Plimsoll and the 1880 Carriage of Grain Legislation.” The Northern Mariner / Le marin du nord, XXX, No. 4 (Winter 2020), 419-448. https://www.cnrs-scrn.org/northern_mariner/vol30/tnm_30_419-448.pdf
“Jack Tar’s Friend.” The Atchison Daily Globe. July 17, 1896. https://www.newspapers.com/image/479999267/?match=4&terms=%22samuel%20plimsoll%22
Japp, Alexander H. “Good men and true : biographies of workers in the fields of beneficence and benevolence.” Philadelphia. Gebbie. 1890. Accessed online: https://archive.org/details/goodmentrue0000unse/page/10/mode/2up
Jones, Nicolette. “The Plimsoll Sensation.” London. Little, Brown. 2006.
Langenberg, William H. “The Plimsoll Mark.” U.S. Naval Institute. Naval History. June 1992. https://www.usni.org/magazines/naval-history-magazine/1992/june/plimsoll-mark
“Lundhill Colliery Explosion.” Northern Mine Research Society. https://nmrs.org.uk/mines-map/accidents-disasters/yorkshire/lundhill-colliery-explosion-barnsley-1857/
“The Name of Samuel Plimsoll … “ Birmingham Gazette. June 4, 1898. https://www.newspapers.com/image/815489724/?match=1&terms=%22samuel%20plimsoll%22
“People's College Sheffield (1842 - 1878).” University of Sheffield. https://archives.shef.ac.uk/agents/corporate_entities/212
Plimsoll, Samuel. “Our Seamen: An Appeal.” London. Virtue. 1873. Accessed online: https://archive.org/details/b20406691/page/n15/mode/2up
Robertson, Jen. “It's Plimsoll Day! (and we're talking about ships, not shoes).” National Museums Liverpool. https://www.liverpoolmuseums.org.uk/stories/its-plimsoll-day-and-were-talking-about-ships-not-shoes

Samuel Plimsoll was an advocate for better working conditions for sailors, and for a lot of other things. A lot of contemporary accounts refer to him as an agitator.
Research:
<ul>
<li>Bibby, Miriam. &ldquo;Samuel Plimsoll and the Plimsoll Line.&rdquo; Historic UK. June 14, 2024. https://www.historic-uk.com/HistoryUK/HistoryofBritain/Samuel-Plimsoll-Line/</li>
<li>Britannica Editors. "Samuel Plimsoll".&nbsp;Encyclopedia Britannica, 30 May. 2026, https://www.britannica.com/biography/Samuel-Plimsoll</li>
<li>&ldquo;Death of Mr. Samuel Plimsoll.&rdquo; The Lichfield Mercury. June 4, 1898. https://www.newspapers.com/image/797510210/?match=1&amp;terms=%22samuel%20plimsoll%22</li>
<li>&ldquo;Friends of Humanity.&rdquo; Democrat and Chronicle. Apr 27, 1913. https://www.newspapers.com/image/135735684/?match=1&amp;terms=%22samuel%20plimsoll%22</li>
<li>Glover, William. &ldquo;Samuel Plimsoll and the 1880 Carriage of Grain Legislation.&rdquo; The Northern Mariner / Le marin du nord, XXX, No. 4 (Winter 2020), 419-448. https://www.cnrs-scrn.org/northern_mariner/vol30/tnm_30_419-448.pdf</li>
<li>&ldquo;Jack Tar&rsquo;s Friend.&rdquo; The Atchison Daily Globe. July 17, 1896. https://www.newspapers.com/image/479999267/?match=4&amp;terms=%22samuel%20plimsoll%22</li>
<li>Japp, Alexander H.&nbsp;&ldquo;Good men and true : biographies of workers in the fields of beneficence and benevolence.&rdquo; Philadelphia. Gebbie. 1890. Accessed online: https://archive.org/details/goodmentrue0000unse/page/10/mode/2up</li>
<li>Jones, Nicolette. &ldquo;The Plimsoll Sensation.&rdquo; London. Little, Brown. 2006.</li>
<li>Langenberg, William H. &ldquo;The Plimsoll Mark.&rdquo; U.S. Naval Institute. Naval History. June 1992. https://www.usni.org/magazines/naval-history-magazine/1992/june/plimsoll-mark</li>
<li>&ldquo;Lundhill Colliery Explosion.&rdquo; Northern Mine Research Society. https://nmrs.org.uk/mines-map/accidents-disasters/yorkshire/lundhill-colliery-explosion-barnsley-1857/</li>
<li>&ldquo;The Name of Samuel Plimsoll &hellip; &ldquo; Birmingham Gazette. June 4, 1898. https://www.newspapers.com/image/815489724/?match=1&amp;terms=%22samuel%20plimsoll%22</li>
<li>&ldquo;People's College Sheffield (1842 - 1878).&rdquo; University of Sheffield. https://archives.shef.ac.uk/agents/corporate_entities/212</li>
<li>Plimsoll, Samuel. &ldquo;Our Seamen: An Appeal.&rdquo; London. Virtue. 1873. Accessed online: https://archive.org/details/b20406691/page/n15/mode/2up</li>
<li>Robertson, Jen. &ldquo;It's Plimsoll Day! (and we're talking about ships, not shoes).&rdquo; National Museums Liverpool. https://www.liverpoolmuseums.org.uk/stories/its-plimsoll-day-and-were-talking-about-ships-not-shoes</li>
</ul>

Samuel Plimsoll was an advocate for better working conditions for sailors, and for a lot of other things. A lot of contemporary accounts refer to him as an agitator.

Samuel Plimsoll, the ‘Sailors’ Friend’

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/df781460-a74a-4f6d-afd3-b49c0183301e/transcript

SYMHC Classics: Penicillin

In 1 playlist(s)

Stuff You Missed in History Class

Social links

Follow podcast

Recent clips