“…Although less easy to administer than procaine penicillin, this preparation has proved to be the natural successor to penicillin in oil-beeswax and is now the most widely used throughout the world, not only for venereal syphilis but also for endemic syphilis and the other treponematoses, yaws and pinta (see Langer and Kruger, 1952;Gay Prieto, Alvares Cascos, and Orusco, 1953;Vilanova and Alvarado, 1953;Cutler, Olansky, and Price, 1955, for venereal syphilis: Murray, Merriweather, and Freedman, 1956;Grin, 1956, for endemic syphilis: Hackett and Guthe, 1956;Samame, 1956;Zahra, 1956;Soetopo, Wasito, Soedarsono, and Tjokrodipo, 1956;Hume andFacio, 1956, for yaws: andRein, Kitchen, Marquez, andVarela, 1952, for pinta: see also Guthe and Willcox, 1954).…”