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 Italian submarine Galileo Galilei Galileo Galilei was an Italian "Archimede"-class submarine built for the Royal Italian Navy ("Regia Marina") during the 1930s. She was named after a famous Italian scientist Galileo Galilei. The ships were designed by the firm Cavallini and were an enlarged version of the preceding . Among the changes were the partially double hulled design, the boats had their ballast tanks rearranged, their range, fuel capacity were increased, and the armament strengthened. The number of torpedoes was increased from 12 on the "Settembrini" class to 16. They displaced surfaced and submerged. The submarines were long, had a