PLATE VI. 
Fie. 1.— Broop of yellow-fever patient, Havana, 1879 (first 
day of sickness, fatal case), maguified 1450 diameters by Zeiss’s 
one-eighteenth-inch homogeneous immersion objective and Tolles’s 
amplifier; spread and dried upon thin glass cover; heliostat. 
Fic. 2.— Bioop of yellow-fever patient, Havana, 1879 (fifth 
day of sickness, fatal case), magnified 1450 diameters by Zeiss’s 
one-eighteenth-inch homogeneous immersion objective and Tolles’s 
amplifier; spread and dried upon glass cover; heliostat. 
