Mrs. Applebaum was surprised when she saw her son Burt at home. 'Why are you home from school so early?' asked Mrs. Applebaum.
'I was the only one who could answer a question,” replied Burt.
'Oh, really?” said Mrs. Applebaum proudly. “What was the question?'
'Who threw the eraser at the principal?'
Elmer McCollumDied 15 Nov 1967 at age 88 (born 3 Mar 1879).American biochemist who originated the letter system of naming vitamins. He discovered vitamins A, B and worked with others on vitamin D. He performed extensive research work in nutrition and growth. He was the first in the U.S. to establish a colony of white rats as laboratory animals to be the subject of his nutrition experiments. In the 1910's, he recognized that a healthy diet required certain fats, and he named the essential component "fat-soluble A," as distinct from another he named "water-soluble B." Although at first he thought each was a single compound, he later showed that they were in fact complexes. He researched how certain minerals were important as nutrients, including calcium, phosphorus, fluorine, manganese and zinc.« |
