Taxation, A State Official on Excessive. F. Smith, 645 Theater Sanitation, Needed Improvements in. William P. Gerhard, 84 Trolley Car, What makes the, go? William Baxter, Jr.*, 316, 408, 564 Trowbridge, John. Latest Developments with the X Rays*, 659 ” ” South-Sea Bubbles in Science, 401 ” ” Wireless Telegraphy*, 59 Vagrant Electricity, Destructive Effects of. H. S. Wynkoop*, 357 Vaughan, V. C. Food Poisoning, 47 Vinland and its Ruins. Cornelia Horsford*, 160 ” The Location of. (Corr.), 500 Volcanic Eruptions in the Philippines, Remarkable. R. L. Packard, 374 “Warming Up.” (Frag.), 506 War, Periodicity of. (Frag.), 735 ” Spirit, The. (Table), 501 Washburn, F. L. Eastern Oyster Culture in Oregon*, 233 Whales, Longevity of. (Frag.), 618 Willson, T. B. How Standard Time is Obtained, 213 Wingless Birds. P. Glangeaud, 254 Wireless Telegraphy. John Trowbridge*, 59 Woman’s Struggle for Liberty in Germany. Mary M. Patrick, 328 Wonderful Century, The. W. K. Brooks, 25 Wynkoop, H. S. Destructive Effects of Vagrant Electricity*, 357 X Rays, Latest Developments with. J. Trowbridge*, 659 Young, Rev. E. R. Do Animals Reason?*, 105 Zola’s Anthropological Traits. (Frag.), 388 Zoölogy: Blind Fishes of North America. C. H. Eigenmann*, 473 THE END. Transcribers’ Notes 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. 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. End of the Project Gutenberg EBook of Appletons' Popular Science Monthly, April 1900, by Various