Colorimetry is concerned with the measurement of, and discrimination between, colours. These are important topics in a wide range of the physical sciences, life sciences, and computing and engineering. Examples of specific areas where the techniques of colorimetry are used are: manufacturers of paints, textiles, plastics and cosmetics (and quality controllers in these industries), those interested in the effect of light in human environments (for example, in terms of its direct effects on the eye, laser safety and design of eye protection and ergonomics of hospital lighting), psychology, physiology and those involved in the technical aspects of photography. The book presents the physiological background behind how colour is perceived and discusses sources of visible radiation, before going on to describe in detail colorimetric techniques for measuring and discriminating between colours. Applications of these techniques are discussed and relevant mathematical data is provided. The book gives a comprehensive account of the physiological aspects of colour, the development of photometry and colorimetry, and applications of colorimetry in a single volume.

La doctrine du Droit est du nombre de celles qui ne dependent pas des experiences mais des definitions, ni des demonstrations a partir des sens mais a partir de la raison et qui, pour ainsi dire, sont de droit et non de fait. Puisque la Justice consiste en effet en quelque convenance et proportion, il est possible de comprendre qu'il y ait quelque chose de juste, meme s'il n'y a personne qui exerce la justice ni sur lequel elle soit exercee, exactement comme des relations numeriques sont vraies, meme s'il n'y a personne qui compte ni rien qui soit compte, et nous pouvons predire au sujet d'une maison, d'une machine, ou d'une republique, sa beaute, son efficacite, son bonheur, dans l'hypothese ou elles doivent exister, meme si elles n'existent jamais.