"They are all equal: formiate or bi-chlorhydrate (quinine dihydrochloride)."
"They are all equal (formiate, sulphate, chlorhydrate, bi-chlorhydrate), except for bi-sulphate which is weaker and thus needs its own special dose."
"I carried, as usual, very little medicine -- merely three gallons of castor oil, a few bottles of iodine, some formiate of quinine, strong carbolic and arsenical soaps, permanganate and other powerful disinfectants, caustic -- that was about all."