3.—_To find the Space through which a Body will fall in any given time._

Multiply the square of the time, in seconds, by 16-1/12, and it will

give the space in feet.

_Example._ Required the space fallen through in seven seconds.

16-1/12 × 7² = 788-1/12 feet. Ans.

4.—_To find the Time which a Body will occupy in falling through a

given space._

Divide the _square root_ of the space fallen through by 4, and the

quotient will be the time in which it was falling.

_Example._ Required the time a body will take in falling through 402.08

feet of space.

√402·08 = 20·049, and 20·049 ÷ 4 = 5·012. Ans.

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