All-American Girls Professional Baseball League rules of play progressively extending the length of the base paths and pitching distance, while decreasing the size of the ball until the final year of play in 1954. For the first five years the circuit used a fastpitch underhand motion, shifted to sidearm in the 1947 season, and overhand pitching began in 1948. All-American Girls Professional Baseball League rules of play The All-American Girls Professional Baseball League was a circuit that began to operate in 1943. Since the only organized ball for women in the United States was softball, the league officials created a hybrid game which included features of both fast-pitch
Yoshida Mitsuyoshi Yoshida Mitsuyoshi , also known as Yoshida Kōyū, was a Japanese mathematician in the Edo period. His popular and widely disseminated published work made him the most well known writer about mathematics in his lifetime. He was a student of Kambei Mori (also known as Mōri Shigeyoshi). Along with Imamura Chishō and Takahara Kisshu, Yoshida became known to his contemporaries as one of "the Three Arithmeticians." Yoshida was the author of the oldest extant Japanese mathematical text. The 1627 work was named "Jinkōki". The work dealt with the subject of soroban arithmetic, including square and cube root operations. In a