A further improvement results from increasing the number of tubes (Fig. 5), keeping them all on the slant, so that the heated water and steam may rise freely.
THE ENCLOSED FURNACE.
Table of Contents
HOW IT WORKS.
10
A further improvement results from increasing the number of tubes (Fig. 5), keeping them all on the slant, so that the heated water and steam may rise freely.
THE ENCLOSED FURNACE.