694 THE POPULAR SCIENCE MONTHLY. 



Jottings on the Nile and in the Desert, Bulletin of the American 

 Geographical Society, 1890. Historical Notes on the Gold-Cure, 

 Popular Science Monthly, 1892. A Plea for a Library of Science 

 in New York City, 1893. Russian Transliteration, American Li- 

 brary Journal, 1893. 



In 1886 Dr. Bolton became interested in folk-lore, and pub- 

 lished two years later a work bearing the title, Counting-out 

 Rhymes of Children (London, 1888), which brought him at once 

 into prominence as a folk-lorist. Since then he has contributed 

 occasional papers to the Journal of American Folk Lore, of which 

 the most notable are the two following : Some Hawaiian Pastimes 

 (1891) and A Modern Oracle and its Prototypes (1893). His work 

 on Counting-out Rhymes was awarded a bronze medal by the 

 Columbian Historical Exposition held at Madrid in 1892. 



After the death of his mother in 1887, Dr. Bolton resigned 

 from Trinity College, retired from teaching, and resumed his resi- 

 dence in New York city. He has been able to indulge his love 

 of travel by frequent journeys abroad; besides the five years' 

 sojourn in Europe already named, he visited in 1873 the principal 

 libraries of England, France, and Germany, to collect material for 

 his Bibliography of Scientific Periodicals, the publication of which 

 was, however, from various causes delayed until 1885. In 1880 

 he visited Norway, Sweden, and Denmark ; in 1887 and 1888 he 

 made a second and a third bibliographical tour in Europe; in 

 1889 he visited Egypt, going as far as Mount Sinai ; in 1890 he 

 visited the Bermudas and the Hawaiian Islands. These distant 

 points were visited in search of " musical sand." In 1891 he again 

 crossed the Atlantic, chiefly for research in libraries. Dr. Bolton 

 has been heard to say he never travels to kill time or to satisfy 

 mere curiosity ; he always has some definite object in view and 

 works harder on his journeys than otherwise. 



Dr. Bolton is often called upon to give illustrated lectures on 

 his travels and on popular science. Being an amateur photogra- 

 pher he brought back with him from Arabia Petraea and from 

 the Hawaiian Islands many excellent negatives with which he 

 illustrates his lectures. These include the following subjects: 

 Four Weeks in the Desert of Sinai, Life and Scenes in the Ha- 

 waiian Islands, Picturesque Scenes in Norway, Alchemy the 

 Cradle of Chemistry, The Counting-out Rhymes of Children, The 

 Glaciers of Switzerland, Musical Sand, etc. 



In 1892 he was elected by the Trustees of Columbian Univer- 

 sity Non-resident Professor of the History of Chemistry, and in 

 the discharge of his duties gave in March, 1893, a course of nine 

 lectures on the history of chemistry. He treats this subject in a 

 graphic way, making it attractive to the general audience by 

 illustrating every step with the lantern. 



