To balance a pin upon a needle would seem rather a formidable
undertaking; but by an application of the same principle no considerable
difficulty is encountered. Stick the pin into another cork in position
corresponding to that of the coin in the first experiment, into which
also fix two forks as in the previous examples. With a little care it is
then quite practicable to rest the head of the pin upon the point of the
needle, where it will remain balanced as in Fig. 3.
[Illustration]