1) Figure numbers (which aren't contiguous) have been preserved.

2) Part III, Chapter V. The table showing thickness of vitrified pipes reads:

The thickness figure for the 6 inch pipe has been left as originally printed, but probably is incorrect (logically it should be somewhere between 1/2 inch and 3/4 inch thick).

3) A larger version of figure 1 can be viewed by clicking on the figure image.