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<img src="https://cdn.kahimyang.com/resources-19/leon-ma-querrero-2.webp" alt="Leon Ma. Guerrero" loading="lazy" />
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(Leon Ma. Guerrero during his late years)
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<p>
Guerrero began his pioneering study on medicinal plants in the early 1900s where he experimented on substitute medicines when synthetic drugs are unavailable.
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<p>
In 1918, he authored a study on "Medicinal Plants" on 174 types of plants with healing elements.
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<p>
He experimented with explosive mixtures made from different plants known as the Guerrero gunpowder, which was tapped by Gen. <a href="https://kahimyang.com/kauswagan/articles/1028/today-in-philippine-history-march-22-1869-emilio-aguinaldo-was-born-in-kawit-cavite" class="news_link">Emilio Aguinaldo</a>'s revolutionary troops when their sulfur, charcoal, among others, ran out to fire their muskets.
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<p>
Hence, Guerrero did not limit his duty to his country as just being a scientist as he held important posts in the revolutionary government - appointed as secretary of industry, agriculture and commerce during <a href="https://kahimyang.com/kauswagan/articles/962/today-in-philippine-history-february-27-1858-pedro-paterno-was-born-in-sta-cruz-manila" class="news_link">Pedro Paterno</a>'s term as president of Emilio Aguinaldo's cabinet and as a delegate to the Malolos Congress.
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<p>
Also, Guerrero became professor at the <i>Universidad Cientifica Literaria de Filipinas</i>, which was established by the revolutionary government in the Barasoain Convent Malolos.
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He died on April 13,1935
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<h4>
Source:
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<ol class="article-sources">
<li>
 Philippine News Agency archives
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</ol>





January 21, 1853: Leon Ma. Guerrero was born Ermita, Manila