In these days of vitamin-fortified bread and iodized salt, and even vitamin C fortified soft drinks, you almost never see the kind of life-threatening deficiency states people first learned to recognize, such as scurvy.
"How and When to Be Your Own Doctor"
Dr. Isabelle A. Moser with Steve Solomon
All who will take the trouble to examine the subject, will soon be convinced that the acid softens the silver, bringing it to a state in which it is extremely susceptible of being either oxydized or iodized, according as the circumstances may occur of its exposure to the atmosphere or the iodine.
"American Handbook of the Daguerrotype"
Samuel D. Humphrey
Experience proves that the common impressions, iodized to a rather light yellow gold tint, and brought by the bromine to a very light, rose color, have their whites very intense, and their deep shades very black.
"American Handbook of the Daguerrotype"
Samuel D. Humphrey