Part 150

Page 414 ff.: Ellipses (...) have been added surrounding the continuing page headings and illustration captions.

Pages 419 and 438, Morse codes: for the sake of clarity, the spacing between individual dashes and dots has been increased slightly.

Page 490: ... if a red flag really makes a bull more exited ... changed to ... if a red flag really makes a bull more excited ....

Page 493: The chemical name for salt is sodium which is derived ... changed to The chemical name for salt is sodium chloride which is derived ...; ... substances around us are composed of these elements along, or ... changed to ... substances around us are composed of these elements alone, or ....

Page 550: ... for which the lingings were intended. After all the lingings have been prepared ... changed to ... for which the linings were intended. After all the linings have been prepared ....

Index: several missing punctuation marks inserted for consistency.

Page 583: Curtis biplane changed to Curtiss biplane.

Page 585: Burline (illus.) changed to Burling (illus.)

Page 586: Culverines, early type of changed to Culverins, early type of.

Page 587: steal and flint changed to steel and flint.

Page 588: Flying boot, interior arrangement changed to Flying boat, interior arrangement.

Page 589: (How) the pictures in this both are made changed to (How) the pictures in this book are made.

Page 590: (How) did shaking the head come to come no? changed to (How) did shaking the head come to mean no?; (How) does does the wool in a suit of clothes cost? changed to (How) much does the wool in a suit of clothes cost?; Hurt, why we cry changed to Hurt, why we cry when, 93.

Page 591: the “Reverbere” changed to the “Réverbère”; (Lamp) from Nashagak hanging changed to (Lamp) from Nushagak hanging.

Page 592: promothean changed to promethean.

Page 593: Kurdestan (illus.) changed to Kurdistan (illus.).

Page 595: Crakron or peaked changed to Crakrow or peaked.

Page 597: omniscope changed to Omniscope; cucular diffusion battery in factory changed to circular diffusion battery in factory.

Page 601: (Who) who make the first felt hat? changed to (Who) made the first felt hat?; (Why) don’t an elevator fall? changed to (Why) doesn’t an elevator fall?

Page 603: (Writing) pen invention of, 00 changed to (Writing) pen, invention of, 11.