17.--BALANCING CUPS.

[Illustration]

[Illustration]

Simple methods of balancing a milk-jug and tea-cup respectively are

shown in Figs. 17, A and B. In the first illustration the cork is placed

inside the handle of the vessel, in which position it should fit with

moderate firmness, so as not to slip, and then two knives are thrust in,

one from each side of the handle, between the cork and the cup itself,

when the cup may be balanced upon any fixed point. In the second a cork

is fixed into the handle, as before, and into the cork the prongs of a

fork are fastened, holding the fork in such a position as to bring the

centre of gravity below the point of suspension. The cup may then be

balanced as before.

The Strand Magazine, Vol. 27, January 1904, No. 157 · 第 52 / 120 题