Charles Henry was a French

French people

The French are a nation that share a common French culture and speak the French language as a mother tongue. Historically, the French population are descended from peoples of Celtic, Latin and Germanic origin, and are today a mixture of several ethnic groups...

 librarian

Librarian

A librarian is an information professional trained in library and information science, which is the organization and management of information services or materials for those with information needs...

 and editor. He was born at Bollwiller

Bollwiller

Bollwiller is a commune in the Haut-Rhin department in Alsace in north-eastern France. It forms part of the Mulhouse Alsace Agglomération, the inter-communal local government body for the Mulhouse conurbation.-References:*...

, Haut-Rhin

Haut-Rhin

Haut-Rhin is a département of the Alsace region of France, named after the Rhine river. Its name means Upper Rhine. Haut-Rhin is the smaller and less populated of the two departements of Alsace, although is still densely populated compared to the rest of France.-Subdivisions:The department...

, and was educated in Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

, where in 1881 he became assistant and afterward librarian in the Sorbonne

Sorbonne

The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

. As a specialist in the history of mathematics, he was sent to Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 to seek some manuscript

Manuscript

A manuscript or handwrite is written information that has been manually created by someone or some people, such as a hand-written letter, as opposed to being printed or reproduced some other way...

s of that nature which the government wished to publish. He edited several works upon kindred subjects, as well as memoir

Memoir

A memoir , is a literary genre, forming a subclass of autobiography – although the terms 'memoir' and 'autobiography' are almost interchangeable. Memoir is autobiographical writing, but not all autobiographical writing follows the criteria for memoir set out below...

s, letters, and other volumes, and wrote critique

Critic

A critic is anyone who expresses a value judgement. Informally, criticism is a common aspect of all human expression and need not necessarily imply skilled or accurate expressions of judgement. Critical judgements, good or bad, may be positive , negative , or balanced...

s upon the musical theories of Rameau and Wronski. He is also credited with the invention of several ingenious devices and instruments used in psychophysiological laboratories. C. Huet's correspondence he published under the title Un érudit, homme du monde, homme d'église, homme de cour (1880), and he issued also Problèmes de géométrie pratique (1884) and Lettres inédites de Mlle. de Lespinasse à Condorcet et à D'Alembert (1887).

Works

• Introduction à une esthétique scientifique, Paris, 1885
• Rapporteuresthétique, Paris, Seguin, 1888
• Cercle cromatique, Paris, Verdin, 1888
• Esthétique et psychophysique, «Revue philosophique», 29, 1890
• Harmonies de formes et de couleurs, Paris, 1891
• L'esthétique des formes, «La Revue blanche», 7, 1894
• Sensation et énergie, Paris, 1910
• Mémoire et habitude, Paris, 1911
• La lumière, la couleur et la forme, «L'esprit nouveau», 1921.