#1: the Qian Long emperor (1736-1795), called "Ch'ien Lung" in the Krauses, which still use the old Wade-Giles romanization system. The pics for this one are upside-down. The mintmark in Manchu script on the other side is for the Board of Revenue mint in the capital, Beijing, KM# 387.1
#2: the Dao Guang (Tao Kuang) emperor (1821-1850), same mint as #1. KM/C# 1-3.
#3: the Jia Qing (Chia Ch'ing) emperor (1796-1820), same mint as the first two. KM# 440.1.
#4: Same emperor as #1, but the mint this time is Board of Works, also in Beijing. The top pic is also upside down. KM# 390.
#5: Same emperor as #1 and #4; I can't clearly make out the mintmark, but it's likely the same as either #1 or #4.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis