Note 2 — VII. THE RED PLACARD
Reading edition
For this ingenious example of the crayon marks I am indebted to Dr. Charles V. Chapin, Health Officer of Providence, Rhode Island, and a distinguished epidemiologist.
Reading edition
For this ingenious example of the crayon marks I am indebted to Dr. Charles V. Chapin, Health Officer of Providence, Rhode Island, and a distinguished epidemiologist.