Inconsistencies and differences in wording and structure between the Table of Contents and the text have not been rectified.
Page 83, paragraph starting Much of the hose in use today ...: as printed in the source document; part of the text may be missing or mixed up.
Changes made:
Illustrations and tables have been moved outside text paragraphs.
In some illustrations reference letters have been enhanced for the sake of clarity; in Fig. 61 reference #1 has been added.
Obvious minor typographical and punctuation errors have been corrected silently. In multiplications, the letter x and the multiplication symbol (×) have been standardised to the latter.
Page 38, Table 2: F´ changed to F¹ cf. text.
Page 141: O´ changed to O¹ cf. Fig. 77a.
Page 149: ... by using metal shins ... changed to ... by using metal shims ....
Page 170: ... the control (Fig. 107) ... changed to ... the control (Fig. 97) ....