Who is credited with inventing the first commercially successful photographic process

This is a form of government run by elected leaders. this is a type of government in which a group of individual states are united under astrong, central government. this is a system of government in which the people participate directly in making allpublic policy. this is form of government in which a monarch is the head of state but his or her powersare restricted by law, usually within a parliamentary system. in this type of government, the elected head of the executive branch acts independentlyof the legislative and judicial branches. in this type of government, there is no clear-cut separation of powers between thelegislative and executive branches, though the legislative has most of the governmentalpower. in this type of government, the institutions of the state are governed as a single unit, with one constitutionally created legislature. this is a type of government in which power is held by a single, self-appointed ruler.