Only four years after the invention of photography was announced to the world in 1839, two Scots had mastered the new medium and were producing works of breathtaking skill in extraordinary quantities. A Perfect Chemistry explores the uniquely productive and influential partnership of David Octavius Hill (1802-1870) and Robert Adamson (1821-1848), which lasted a few short years from 1843 until early 1848. These stunning images, which belie the almost unimaginable technical challenges faced by the duo, are arguably among the first examples of social documentary in the history of photography.