The illustrations have been moved so that they do not break up paragraphs and so that they are near to the text they illustrate.
Misprints in the table SAVING DUE TO HEATING THE FEED WATER, Pg. 1936 have been corrected, they are:
| Init. Temp. | Pressure | Old Value | New Value |
| 130 | 40 | .0954 | .0934 |
| 200 | 40 | .0900 | .0999 |
| 210 | 40 | .1000 | .1010 |
| 230 | 100 | .0017 | .1012 |
In the original text, there are two Fig. 2769's and two Fig. 2770's. The second of each has had an "A" suffix added, i.e. 2769A and 2770A.
On line 10984 the word "impedence" was corrected to "impedance".
Inconsistent spelling and hyphenation has been left as in the original.