William Brooks Johnson

William Brooks Johnson (1763–1830) was an English physician and botanist.
He was educated at Christ's College, Cambridge and became a medical practitioner with a particular interest in botanical chemistry. He resided at Coxbench Hall, Derbyshire and was a member of the Derby Philosophical Society where he received encouragement from Erasmus Darwin. He was author of The History of the Present State of Annual Chemistry published in three volumes in 1803.