In 1875, he met industrialist Carl Zeiss, who was producing optical instruments. The cooperation between them turned into a partnership in a short time and Zeiss factories became one of the few big companies in the world.
Abbot developed various methods and instruments to measure the Sun's luminosity and temperature.
Abd al-Qadir Maraghi is considered one of the greatest music scholars of the Eastern world in Western sources as well as in classical Islamic sources. In his time, the science of music was in great development.
He did not understand doubt as a vicious circle, a contradictory connection established between concepts, but saw it as a method to go into details to shed light on the subject.
Perhaps Abel's most important contribution to explosive chemistry was his solution to the problem of cotton gunpowder production.
Throughout his life, Abendroth has been interested in the situation of the working class and has studied the history of the unions and the working class.
After a strict religious education, he became a physician. He tried to solve philosophical problems by looking at physiology.
Abraham is one of the pioneers of psychoanalytic therapy on subjects such as libido development, character formation, schizophrenia, and manic-depressive psychosis.
The main importance of Adams was that he was a good educator, editor, and organizer. Many famous historians were trained in the history department he taught.
Adams was recognized as one of the competent astronomers of his time on the dynamics of the solar system.
