MARY PREVITEâS SPEECH AT THE SIXTIETH ANNIVERSARY CELEBRATION OF THE LIBERATION OF THE WEIHSIEN CONCENTRATION CAMP. August 17, 2005 Weifang, Shandong Province, China. Honorable Mayor Zhang Xinqi, honorable friends of Weifang, you have earned our deepest gratitude by inviting us here to celebrate this Day of Liberation.
TIL that in 1669, Hennig Brand discovered phosphorus by boiling down urine and heating the residue to very high temperatures. He was trying to make gold though, and he hoped that the yellow color of urine meant there was gold in it. (chemicool.com) submitted 4 years ago by virnovus 8. 89 comments; share; save
educator Johann Guts Muths developed a system of therapeutic gymnastics designed to maintain physical condition and health.6 He was soon followed by fellow German physical educator Friedrich Ludwig Jahn, who created a gymnastics system called turnen, which can be roughly translated as âmovement.â7 Also during the early 1800s, Pehr Henrik Ling, a Swedish instructor of gymnastics, used anatomic and physiologic principles to restructure the gymnastics system developed by Muths.