Complex sentence: Henry Letheby (1816--1876), analytical chemist and public health officer, was born at Plymouth in 1816, and studied chemistry at the Royal Cornwall Polytechnic Society.
Split into simpler sentences: Henry Letheby (1816--1876) was an English analytical chemist and public health officer. Letheby was born at Plymouth in 1816, and studied chemistry at the Royal Cornwall Polytechnic Society.