The Difference Between Engineers and Scientists

The inventor and the research man are confused because they both examine results of physical or chemical operations. But they are exact opposites, mirror images of one another. The research man does something and does not care [exactly] what it is that happens, he measures whatever it is. The inventor wants something to happen, but does not care how it happens or what it is that happens if it is not what he wants.

The work of both appears similar, but one does not care about the result and merely records it, the other cares about the result and cares not about the process to achieve it.