It is a process where professionals are to guide hearing parents or the society itself about raising their children that may become hearing impaired. One of which is the idea of providing information to hearing society about raising hearing impaired children for their growth.
He tells John that he would like the "experiment" (of John living in London society) to continue. In other words, he is interested in continuing to experiment with John's life at John's expense.
The House of Representatives and Senate make up the legislative branch of government