What does he mean when he refers to factories as nurseries of diease and vice

It's a metaphor, darling. A nursery (whether it's a plant nursery or a nursery school) is a place where small plants or human beings are carefully nutured so that they can grow. "He" (whoever this mysterious "he" is that you're referring to) is asserting that factories are places where bad things like "disease and vice" can similarly grow and flourish.

i think you are talking about the image i am uploading. then let's see who is who and based on that, let's answer your question about what section represents the state-level courts.

who is who:

box a: state trial courts box b: intermediate appellate courts   box c: state supreme courts box d: u.s. supreme court box e: u.s. courts of appeals box f: u.s district courts

which section represent state-level courts?

the correct answer is a, b, c.

box a or state trial courts are the bottom level and they decided about the 95% of the nation's legal cases.box b or intermediate appellate courts (also called state court of appeals in some states) are the second level above trial courts. they have the authority to review decisions and judgments of the trial court judges.box c or state supreme courts are the highest level in the u.s. state court system.   their primary responsibility consists of correcting the errors of the inferior state courts. they exclusively hears appeals on legal issues from inferior state courts. since state supreme courts do not make any finding of facts, they do not hold trials.