Wife texts husband on a cold winter morning: "Windows frozen, won't open."
Husband texts back: "Gently pour some lukewarm water over it and then gently tap edges with hammer."
Wife texts back 10 minutes later: "Computer really messed up now."
Karl von VierordtBorn 1 Jul 1818; died 22 Nov 1884 at age 66.German physician and professor of medicine who invented the sphygmograph (1854), the first instrument to trace a human pulse by a non-invasive measurement of blood pressure. His method of using weights and a mechanical balance was crude, but did establish the principle that blood pressure could be measured by finding the counter pressure needed to balance the arterial pulsation. In 1852, he developed a technical method by which blood cells could be counted (though too tedious to gain widespread use). Vierordt also devised the hemotachometer to monitor the speed of blood flow. He made spectrographic analyses of haemoglobin solutions, bile, and urine and also studied respiration and sound conduction.« |
