Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in this book; otherwise they were not changed.
Simple typographical errors were corrected; occasional unbalanced quotation marks retained.
Ambiguous hyphens at the ends of lines were retained.
Page 162: “ominum gatherum” likely is a misprint for “omnium gatherum”.
Page 167: “resistent” was printed that way twice in this article. In a different article, it was twice printed “resistant”.
Page 207: Unmatched closing quotation mark deleted after “from other men.”
Page 211: “corrolary” was printed that way.
Page 214: “calcium carbid” was printed that way.
Page 220: The first occurrence of “American Museum of Natural History” was printed without the “of”; the second with it.
This eBook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg™ License included with this eBook or online at www.gutenberg.org. If you are not located in the United States, you will have to check the laws of the country where you are located before using this eBook.