In 1888, John Boyd Dunlop, a Scottish veterinary surgeon living in Ireland discovered the pneumatic tyre principle. Willie Hume created publicity for J B Dunlop's discovery by winning seven out of eight races with his pneumatic tyres.
What, invented by William Harbutt of Bath, England in 1897, is composed of calcium salts (principally calcium carbonate), petroleum jelly, and long-chain aliphatic acids (principally stearic acid)?
