Peter Guthrie Tait (1831-1901) was a Scottish mathematical physicist and early pioneer in thermodynamics. He is best known for the mathematical physics textbook Treatise on Natural Philosophy, which he co-wrote with William Thomson (Lord Kelvin), and his early investigations into knot theory.
This series of archival digital prints combine his research into knot theory (specifically
his table of all prime knots with seven crossings or fewer) with his work on the four colour theorem. In mathematics, the four colour theorem, or the four colour map theorem, states that, given any separation of a plane into contiguous regions, producing a figure called a map, no more than four colours are required to colour the regions of the map so that no two adjacent regions have the same colour.