What scientist was born on today's date?

November 21
Pacific Time Zone

Johann August Brinell (Engineering)
Birthday: 1849, Bringetofta, Sweden
Johann August Brinell attended a technical school and while working as a designer and iron-works engineer, he became interested in metallurgy. In 1885 he wrote about textural changes of steel during heating and cooling. He developed an instrument to determine the hardness of steel and experimented on abrasion resistance of various materials.

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