But there was one yet - the biggest, the most blank, so to speak - that I had a hankering after.

Mathematical laws can be proved purely through mathematics, without scientific experimentation.

The outer suburbs of Xi’an, in which there are 108,000 hectares of farmland, are the municipality’s agricultural districts. The majority of the farmland is in the northern and north-eastern suburbs and the Yanliang District.

But they who have not this doubt, and have a mind to see the issue of the Theory, may skip these two Chapters, if they please, and proceed to the following