1841 william henry patents the calotype process, exposing wet (instead of dry) paper for a much shorter amount of time with a sharper image. this is the first negative-positive process making possible the first multiple copies.

Answer which of the following was a major outcome of european imperialism in africa after the industrial revolution? o a. the area around the suez canal experienced decades of military conflict. b. africans in the belgian congo suffered forced labor and oppression. o c. the discovery of rich natural resources led to african economic prosperity. o d. europeans brought disease to central africa, killing thousands.