Part 15

Simple typographical errors were corrected; occasional unbalanced quotation marks retained.

Ambiguous hyphens at the ends of lines were retained.

In some editions of this eBook, the superscript “e” in the address on page 708 appears as a normal “e”, the asterism immediately following it appears as ::, and subscripted numbers in chemical formulas appear as normal numbers, such as H2O.

The other five issues of Volume 56 also are available at Project Gutenberg. The eBook numbers are 44725, 47024, 47180, 47181, and 46473.

Page 635: “wofully” was printed that way.

Page 649: Missing closing quotation mark added after “howling wilderness,”.

Page 683: “Boisbandran” is a misprint for “Boisbaudran”.

Page 731: “Adrian’s” was printed that way; may refer to “Hadrian”.

Page 734: “Pittsburg” was printed that way.