Galileo Galilei to the biography by Vincenzo Viviani) that these began by watching the swings of the bronze chandelier in the cathedral of Pisa, using his pulse as a timer. Later experiments are described in his "Two New Sciences". Galileo claimed that a simple pendulum is isochronous, i.e. that its swings always take the same amount of time, independently of the amplitude. In fact, this is only approximately true, as was discovered by Christiaan Huygens. Galileo also found that the square of the period varies directly with the length of the pendulum. Galileo's son, Vincenzo, sketched a clock based on his father's
Italian submarine Galileo Galilei briefing between captains and the submarine command in Massawa before every mission. The claim was reported only to cover the British intelligence activities in Italian East Africa. After her capture, "Galileo Galilei" was berthed at Port Said and served as a generating station to charge the batteries of British submarines. She was commissioned into the Royal Navy in June 1942 as HMS "X2" (later changed to "P 711"), and was operated as a training boat in the East. She was scrapped on 1 January 1946. Italian submarine Galileo Galilei Galileo Galilei was an Italian "Archimede"-class submarine built for the Royal