The author looks at the physics of light, the predominant theories of his day, and the need to standardize the study and terminology. Lovibond is the inventor of the Tintometer, a 19th century colorimeter or colour comparison device, based on his research into colour theory and his experience as a brewer. He knew that different beers reflected their alcohol and sugar contents by their colour, and by accurately measuring this he could ensure the beer’s quality. Extending that idea throughout the colour spectrum gave birth to his device which could be used in any number of industrial, scientific, artistic and even anthropological applications. It also gave birth to his intense interest in light and colour, on which he wrote several books.