How to weigh a cat...

Step 1: Leave empty paper box in strategically cat populated area.

Step 2: Wait for cat to jam himself into box and fall asleep...just all know that being crammed into a box with your head balanced on a vertical edge is the best bed one could hope to find.

Step 3: Lift said cat in box and place on scale. Voila.

Result: The Proto-Book Cat (rapidly outgrowing that name) currently weighs 8 pounds, 4.5 ounces.