He helped his father in his business as a manufacturing chemist.

Before going to the University College, Durham in 1850, he was for some years engaged in business as a manufacturing chemist.

His father was a manufacturing chemist believed to have specialized in the production of dyes for the linen industry.

Towards the end of the war he began working for a manufacturing chemist's laboratory in Manchester.

June 6 - Friedrich Bayer (died 1880), German manufacturing chemist.

He then joined a company of pharmaceutical manufacturing chemists, working as a manager.

In 1803 he settled in Goswell Street, London, as a manufacturing chemist.

He returned to Philadelphia in 1890 and became a manufacturing chemist.

Images printed on the paper served as the manufacturing chemist's signature.

May 6 - Friedrich Bayer (born 1825), German manufacturing chemist.