Slapped cheek disease (also known as fifth disease or parvovirus B19). Incubation period: 1-20 days. Infectious period: A few days before the rash appears (children are no longer contagious when the rash appears).Symptoms: 1  It begins with a fever and nasal discharge.2  A bright red rash, like the mark left by a slap, appears on the cheeks.ncubation period: 1-20 days. Infectious period: A few days before the rash appears (children are no longer contagious when the rash appears). Symptoms: 1  It begins with a fever and nasal discharge. 2  A bright red rash, like the mark left by a slap, appears on the cheeks.
#1. The First Photograph. The worldâs first photograph made in a camera was taken in 1826 by Joseph NicÃ©phore NiÃ©pce. The photograph was taken from the upstairâs windows of NiÃ©pceâs estate in the Burgundy region of France.
Salt print. Edinburgh Ale: James Ballantine, Dr George Bell and David Octavius Hill by Hill & Adamson, a salt print from a calotype paper negative, ca. 1844. The salt print was the dominant paper-based photographic process for producing positive prints during the period from 1839 through approximately 1860. The salted paper technique was created in the mid-1830s by English scientist and inventor Henry Fox Talbot.