Technological and industrial history of 20th-century Canada Blood tests would become increasingly sophisticated in the coming years. The electroencephalograph, used for the diagnosis of neurological disorders was introduced in major Canadian medical institutions in the late forties. The techniques for the mass production and distribution of vaccines and for the mass public inoculation were introduced during these years. Polio was a disease that affected large numbers of Canadian children during the first part of the 20th century. In the US, research by Dr. Jonas Salk in the late 1940s led to the discovery of vaccine for the prevention of this disease. However, there was no technique for
Salk School of Science in the center. Students will normally exit through the right hand exit. There is school bus service which will bring students to and from school. NYCDOE Notably, the school has established relationships with many neighborhood businesses. If a student experiences trouble outside the school, the student can find refuge in almost any business nearby, and the proprietor will call both the school and 911. This has served as a model for many NYC schools. Salk School of Science The Salk School of Science is a junior high school, located in Lower Manhattan, New York City. It was founded in 1995