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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from The Chinese Boy and Girl by Isaac Taylor Headland: because, forsooth, they know nothing about making the spring.
There are some principles, however, which, though they
may not understand, they are nevertheless able to utilize;
such, for instance, as the expansion of air by heat, and the
creation of air currents. This principle is utilized in
lanterns. In the top of these is a paper wheel attached to a
cross-bar on the ends of which are suspended paper men
and women together with animals of all kinds making a
very interesting merry-go-round. These lantern-figures
correspond to the sawyers, borers, blacksmiths, washers
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