Making of Tom & Jerry

I was talking to a friend over dinner on how earlier days of animation involved thousands of hand-drawn sketches unlike today's computer generated pictures... how 100s of hours of effort was put into a 5 minute cartoon... so here is what I found on the web.

Every second of finished film consists of 24 frames, requiring 12 to 24 drawings, depending upon the speed of movement - faster movements need more drawings per second, slower moves can be animated with less, with three or even more frames shot of every drawing (from).

And here is a small sketch that I shud have made long back :)