Arranging a surprise event for a memmber of your family

I'm confused what do you need?

this labor, by slow prudence to make mild.   c. ability to govern well

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.