Bohemian style was not really until the First World War that "many working women ... embarked on a revolution in fashion that greatly reduced the weight and restrictions imposed on them by their clothing". Some women working in factories wore trousers and the brassiere (invented in 1889 by the feminist Herminie Cadolle and patented in America by Mary Phelps Jacob in 1914) began gradually to supersede the corset. In shipyards "trouser suits" (the term, "pantsuit" was adopted in America in the 1920s) were virtually essential to enable women to shin up and down ladders. Music hall artists also helped to push the
Streeter–Phelps equation The study was based on data obtained from May 1914 to April 1915 by the United States Public Health Service under supervision of Surg. W.H. Frost. More complex versions of the Streeter-Phelps model were introduced during the 1960s, where computers made it possible to include further contributions to the oxygen development in streams. At the head of this development were O'Connor (1960) and Thomann (1963). O'Connor added the contributions from photosynthesis, respiration and sediment oxygen demand (SOD). Thomann expanded the Streeter-Phelps model to allow for multi segment systems. The simple Streeter-Phelps model is based on the assumptions that a single