1 4/2 and 4/8 are also simple quadruple. 2  Notice that a time signature in simple meter will always have a 2, 3, or 4 for the top number. 3  While beats in simple meter are divided into two notes, beats in compound meter are divided into three. 4  To demonstrate this, we will examine 6/8 time.
The Discovery and Isolation of Caffeine. Caffeine has been used as a medicinal and recreational drug since before recorded history, by consumption of caffeine bearing plants. However, the discovery of the chemical did not occur until a young physician called Friedlieb Ferdinand Runge isolated and purified the white crystalline substance in 1819.
From 1923 to 1947, 12 Blacks earned a Ph.D. in Mathematics. 1923 The first African to earn a Ph.D. was Ali Mostafa Mosharafa, of Egypt, who received his Ph.D. (1923) and D.Sc. (1924) from the University of London in 1923 and 1924.