Resumen de Tracking tritium, chasing dengue, questioning evidence.

• Presents briefs from the 1854, 1904, and 1954 editions of 'Scientific American.' Efforts of public health leaders worldwide to disseminate family planning and contraception in order to develop a better balance between resources and populations in 1954; Consideration of the poor health conditions that resulted from the outbreak of dengue fever in 1904; How John Hendrickson was charged with poisoning his wife with aconitine in 1854.