fectious Diseases: Causation and Immunity," giving the facts that have been established in this field up to date; and 'A Further Study of Involuntary Movements," by Professor Joseph Jastrow, supplementing a previous paper on this subject, will appear. - Charles Scribner's Sons issued on Aug. 8 Stevenson's longexpected book on Samoa, entitled "A Footnote to History," being a narrative of the varied history of that island for the past eight years. -J. B. Lippincott Company's August Bulletin of New Publications contains, among other announcements, the following: "Photography: Its History, Processes, Apparatus, and Materials. Comprising Working Details of all the more Important Methods," by A. Brothers. In the preparation of this work, the author's aim has been to produce a Handbook for the Use of Students of Photography, which should give the results of practical experience, and include inforas far as possible within a moderate compass mation gathered from many sources, and not readily accessible. The newer methods have been dealt with in sufficient detail, and special attention given to the processes in use prior to the introduction of the gelatino-bromide method. Some of these processes are in danger of being neglected through the facilities which the newer methods have introduced. But, as Professor Brothers demonstrates, the new processes do not give results equal to the old, and are totally unsuitable for some purposes such as making negatives for photo-lithography, and in various other ways. Where practicable, the plates illustrate the processes described, Publications Received at Editor's Office. APGAR, AUSTIN C. Trees of the Northern United BOLLES, T. DIX. Chinese Relics in Alaska. 66 thus making the work distinctly more serviceable to students. "In Starry Realms: a New Work on Astronomy," by Robert S. Ball; "Regional Anatomy in its Relation to Medicine and Surgery," by George McClellan, M.D.; Steam Boilers: their Defects, Management, and Construction," by R. D. Monro. Of books in press, "A Short Course on Zoology Designed for High Schools and Academies," by C. De Montmahon and H. Beauregard; translated and adapted for American schools by Wm. H. Greene, M.D. "Recent Rambles, or in Touch with Nature," by Charles C. Abbott, M.D. - Ginn & Co. have nearly ready "German Orthography and Phonology," by George Hempl, Assistant Professor of English in Michigan University. They will publish in the fall "Fourier's Series, and Spherical, Cylindrical, and Ellipsoidal Harmonics," with applications to problems in mathematical physics, by W. E. Byerly. - Outing for August opens with the first instalment of Wheelman Frank G. Lenz's description of a cycling tour around the world. The rider is at present somewhere on the broad western plains, en route for the Pacific coast, and during his two-year jaunt he will traverse Japan, China, India, Persia, Turkey, Austria, Germany, Holland, France, England, Scotland, and Ireland. Mr. Lenz will communicate his experiences to Outing from convenient points of his journey, illustrating his articles by photographs taken by himself. The opening chapter describes the trip Reading Matter Notices. Exchanges. [Free of charge to all, if of satisfactory character. Address N. D. C. Hodges, 874 Broadway, New York.] Wants. Any person seeking a position for which he is qualihed by his scientific attainments, or any person seeking some one to fill a position of this character, be it that of a teacher of science, chemist, draughtsman, or what not, may have the Want' inserted under this head FREE OF COST, if he satisfies the publisher of the suitable character of his application. Any person seeking information on any scientific question, the address of auy scientific man, or who can in any way use this column for a purpose consonant with the nature of the paper, is cordially invited to do so. EIGENMANN, CARL H. The Fishes of San Diego. including a full local collection of bird skins, show- Polytechnic, Organic and Analytical, desires a Taxidermist going out of business has quantity of Washington, Government. 8°. Paper. HOFFMAN, B. B The Sloyd System of Wood Working. New York, American Book Co. 12°. 242 p. $1. JEFFERSON, Samuel. Columbus, An Epic Poem. Chicago, S. C. Griggs & Co. 12°. 239 p. LINTON, EDWIN. Notes on Avian Entozoa. Wash ington, Government. 8°. Paper. Ill. MASON, OTIS T. The Ulu, or Woman's Knife of the Eskimo. Washington, Government. 8°. Paper. Ill. RATHBURN, MARY J. Catalogue of Crabs of the Family Periceride Washington, Government. 8°. Paper. RICKOPF, REBECCA D. A Supplementary First Reader. New York, American Book Co. 12°. 122 p. 25 cts. SHUFELDT, R. W. The Evolution of House Building among the Navajo Indians. Washington, Gov. ernment. 8°. Paper. Ill. SHUFELDT, R. W. A Maid of Wolpai. Washington, Government. 8°. Paper. SMITH, JOHN B. Revision of the Genus Cuculla, Washington, Government. 8°. Paper. STYNEGER, LEONHARD. Preliminary Description of a new Genus and Species of Blind Cave etc. 86 p. Salamander. Washington, Government. 8°. Paper. Ill. STYNEGER, LEONHARD. Notes on a Collection of Birds made in Japan. Washington, Government. 8°. Paper. WILLIAMSON, MRS. M. BURTON. An Annotated List of the Shells of San Pedro Bay. Washington, Government. 8°. Paper. Ill. INDEXES ΤΟ To exchange; Experiment Station bulletins and reports for bulletins and reports not in my file. I will send list of what I have for exchange. P. H. ROLFS, Lake City, Florida. For exchange.-A fine thirteen-keyed flute in leather covered case, for a photograph camera suitable for making lantern slides. Flute cost $27, and is nearly new. U. O. COX, Mankato, Minn. Finished specimens of all colors of Vermont marble for fine fossils or crystals. Will be given only for valuable specimens because of the cost of polishing. GEO. W. PERRY, State Geologist, Rutland, Vt. For exchange.-Three copies of "American State For Sale or Exchange for books a complete private chemical laboratory outfit. Includes large Becker balance (200g. to 1-10mg), platinum dishes and crucibles, agate motors, glass-blowing apparatus, etc. For sale in part or whole. Also complete file of Silliman's Journal, 1862-1885 (62-71 bound); Smithsonian Reports, 1854-1883; U. S. Coast Survey. 1854-1869. Full particulars to en Volumes XVII. and XVIII. quirers. F. GARDINER, JR., Pomfret, Conn. the Reports on the Birds of the Pacific R. R. Survey, are in preparation, and will be bound in 2 vols., morocco; and a complete set of the Reports of the Arkansas Geological Survey. Please give editions and dates in corresponding. R. ELLSWORTH issued at an early date. CALL, High School, Des Moines, Iowa. HEMIST AND ENGINEER, graduate German position in laboratory or chemical works. Address 213% E. 7th Street, New York, care Levy. A MAN, 86 years old, of extensive experience, hav ing the degrees of A.M. and Ph.D., desires a first-class opening as a teacher of Zoology and kindred studies in a college or university. Can furnish numerous testimonials or references as to success and skill in most modern laboratory methods. Address E. W. D., Md. Agr. College, College Park, Md. A YOUNG MAN, with a thorough training in Analytical Chemistry (including analysis of minerals, food, water, etc.), and holding a diploma of the School of Practical Science, of Toronto, and good testimonials, desires a position as Analytical Chemist or as assistant to such. Address to WM. LAWSON, 16 Washington Ave., Toronto, Ontario. ANTED.-By a young man, a Swarthmore College junior, a position as principal of a public high school in one of the Gulf States, or as instructor in botany, physiology, and geology in an academy or normal school. Address B., care of Librarian, Swarthmore College, Penn. WA ANTED.-To act as correspondent for one or two daily or weekly papers. Have worked on paper for about two years Would like a position on editorial staff of humorous paper. Address GEO. C. MASON, 14 Elm St., Hartford, Conn. across the Alleghanies from Pittsburgh via Washington to New York, and is profusely illustrated. -The experiment station of Cornell University conducted an experiment in 1890, showing very decided beneficial results from removing the tassels from a part of the growing corn; their calculations showing about fifty per cent gain from the rows from which the tassels were removed over the alternate rows on which the tassels were allowed to remain. This remarkable showing caused a similar experiment to be undertaken at the Ohio station in 1891. Thirty-two rows of corn, running over quite uniform land, were selected upon which to make this trial. On Aug. 1, the tassels were pulled from each alternate row. At cutting-time four rows, having the tassels removed, were cut and shocked together, then four rows from which the tassels were not removed were shocked together. Continuing this throughout the thirtytwo rows, they had when done four shock rows of each. When husked these shock rows were weighed separately. They also Horsfords Acid Phosphate, separated the merchantable from the unmerchantable corn, and calculated the yield of each separately per acre. They find that the unmerchantable corn from the four plots from which the tassels were removed averages 26 per cent, while the averages from the other four rows is 21 per cent unmerchantable. The calculations also show that the average yield per acre is about one bushel less than where the corn was left undisturbed. It is probable that the tassels were not removed in this experiment early enough. To insure or even make possible beneficial results from removing tassels, the pulling should be done as soon as they appear, and before the stalk has weakened itself in an attempt to perfect the tassel. The theory upon which this experiment is based is that the strength that would otherwise go to the maturing of the tassel and production of pollen is diverted to the use of grains, and from their more complete development more corn is produced. The fodder in this experiment was not weighed, because back-water from a high river damaged it to such an extent as to make the weight unreliable. LITERARY OUTFIT FREE. THE WEEKLY BULLETIN Anyo e sending us $1.00 at once and mentioning OF NEWSPAPER AND PERIODICAL inches), 223 pages, illustrated. This is a regular Catalogues and Classifies Each Week $2.00 book and a bargain at that price... $2 00 The Library," a 100-tage b ok containing a 1 year's subscription to the "Literary Light," a monthly magazine of Ancient, Medieval and Modern Literature... 50 THE PRINCIPAL CONTENTS OF 50 INDEX OF TECHNICAL LITERATURE 1 00 $4.00 $4.00 actual value for $1.00. Sample copy of "Lit prescribed erary Light," 10 cents (postal card won't do). Recommended and prescribed by physicians of all schools FOR DYSPEPSIA, NERVOUSNESS, EXHAUSTION, Address, Literary Light, 243 4th Ave. S. EST The Bulletin Supplies The Articles Catalogued. Address THE WEEKLY BULLETIN, Minneapolis, Minn. STERBROOK'S OF SUPERIOR AND STANDARD QUALITY. and all diseases arising from im- Leading Nos.: 048, 14, 130, 135, 239, 333 perfect digestion and derangements of the nervous system. It aids digestion, and is a brain and nerve food. Descriptive pamphlet free. Rumford Chemical Works, Providence R. I. Beware of Substitutes and Imitations. SCIENCE CLUBBING RATES. 10% DISCOUNT. We will allow the above discount to any subscriber to Science who will send us an order for periodicals exceeding $10, counting each at its full price. N. D. C. HODGES, 874 Broadway, N. Y. PATENTS MINERALS For INVENTORS. 40-page BOOK FREE. Address Cabinet Specimens, Collections, and ), material by the pound, for mineralogists, collectors, colleges, schools, and chemists. Send for 100-page catalogue, paper bound, 15 cents; cloth bound, 25 cents; supplement, 2 cents. GEO. L. ENGLISH & CO., Mineralogists, 783 & 785 B'way, N. Y. Societas Entomologica. International Entomological Society, Zurich-Hottingen, Switzerland. Annual fee, ten francs. The Journal of the Society appears twice a month, and consists entirely of original articles on entomology, with a department for advertisements. All members may use this department free of cost for advertisements relating to entomology. The Society consists of about 450 members in all countries of the world. The new volume began April 1, 1892. The numbers already issued will be sent to new members. For information address Mr. FRITZ RUHL, President of the Societas Entomologica, Zurich-Hottingen, Switzerland. WORLD-ENGLISH. 25 Cents. HANDBOOK OF 25 Cents. Ex President Andrew D. White, of Cornell University, says: "I believe that the highest interests of Christian civilization and of humanity would be served by its adoption." "So set down, our tongue is the best for the world to unite upon."-Brooklyn Eagle. The idea of Mr. Bell has much to recommend it, and the presentation is charmingly clear."-American, Phila. "The result is a language which cannot fail to meet with acceptance."-Boston Traveller. "World English deserves the careful consideration of all serious scholars."-Modern Language Notes. Sent, postpaid, on receipt of price. N. D. C. HODGES, 874 Broadway, New York. QUERY. Can any reader of Science cite a case of lightning stroke in TO THE READERS OF SCIENCE. PUBLISHER'S ANNOUNCEMENT. which the dissipation of a small Titles of Some Articles Published in Science since | Baur, G., Clark University, Worcester, Mass. Jan. 1, 1892. Aboriginal North American Tea. Activism. Agriculture, Experimental, Status of. Beal, W. J., Agricultural College, Mich. Anatomy, The Teaching of, to Advanced Medical Brinton, D. G., Philadelphia, Pa. Students. Anthropology, Current Notes on. Architectural Exhibition in Brooklyn. Artesian Wells in Iowa. Astronomical Notes. Botanical Laboratory, A. Brain, A Few Characteristics of the Avian. Bythoscopida and Cereopida. Canada, Royal Society of. Celts, The Question of the. Chalicotherium, The Ancestry of. Cragin, F. W., Colorado Springs, Col. Davis, W. M., Harvard College, Cambridge, Mass. Farrington, E. H., Agricultural Station, Champaign, Ill. Ferree, Barr, New York City. Flexner, Simon, Johns Hopkins University, Baltimore, Md. Foshay, P. Max, Rochester, N.Y. Chemical Laboratory of the Case School of Applied Gallaudet, E. M., Kendall Green, Washington, D.C. Science. Children, Growth of. Collection of Objects Used in Worship. Cornell, The Change at. Deaf, Higher Education of the. Electrical Engineer, The Technical Education of. Eskimo Throwing Sticks. Etymology of two Iroquoian Compound Stems. Eye-Habits. Garman, S., Museum of Comp. Zool., Cambridge, Golden, Katherine E., Agricultural College, Lafay ette, Ind. Hale, Edwin M., Chicago, Ill. Hale, George S., Boston, Mass. Hale, Horatio, Clinton, Ontario, Canada. Hall, T. Proctor, Clark University, Worcester, Mass. Halsted, Byron D., Rutgers College, New Brunswick, N.J. Facial Expressions. Motor Muscles of, to Certain Haworth, Erasmus, Oskaloosa, Iowa. Family Traits, Persistency of. Fishes, The Distribution of. Fossils, Notice of New Gigantic. al-Four-fold Space, Possibility of a Realization of. pub. Artificial, Detection of. Glacial Phenomena in Northeastern New York. lished far and wide among elec- Hemipter us Mouth. Structure of the. Hofmann, August Wilhelm von. Hypnotism among the Lower Animals. Indian occupation of New York. Influenza, Latest Details Concerning the Germs of. ation of. Iowa Academy of Sciences. Jassida; Notes on Local. Klamath Nation, Linguistics. Lewis H. Carvill, Work on the Glacial Phenomena. from. tion of. Maize Plant, Observations on the Growth and Chemi- Hay, O. P., Irvington, Ind. Haynes, Henry W., Boston Mass. Hazen, H. A., Weather Bureau, Washington, D.C. Hicks, L. E., Lincoln, Neb. Hill, E. J., Chicago, Ill. Hill, Geo. A., Naval Observatory, Washington, D.C. Holmes, E. L. Chicago, Ill. Hotchkiss, Jed., Staunton, Va. Howe, Jas. Lewis, Louisville, Ky. Hubbard, Gardiner G, Washington, D.C. Jackson, Dugald C., Madison, Wisconsin James, Joseph F., Agricultural Dept., Washington, Johnson, Roger B., Miami University, Oxford, O. Kellicott, D. S., State University, Columbus, O. Lintner, J. A., Albany, N. Y. Loeb, Morris, New York City. Mabery, Charles F., Cleveland, Ohio. McCarthy, Gerald, Agricultural Station, Raleigh, Maya Codices, a Key to the Mystery of. Washington. Museums, The Support of. Physa Heterostropha Lay, Notes on the Fertility of. City. Osborn, Herbert, Agricultural College, Ames, Iowa. Psychological Laboratory in the University of To- Sanford, Edmund C., Clark University, Worcester, ronto. Psychological Training, The Need of. Rivers, Evolution of the Loup, in Nebraska. Sistrurus and Crotalophorus. Star Photography, Notes on. Storage of Storm-Waters on the Great Plains. Tiger, A New Sabre-Toothed, from Kansas. Trachea of Insects, Structure of. Vein- Formation, Valuable Experiments in. Zoology in the Public Schools of Washington, D. C. Ward, R. DeC., Harvard University, Cambridge, Some of the Contributors to Science Since Jan. Aaron, Eugene M., Philadelphia, Pa. Mass. Ward, Snley M., Scranton, Pa. Welch, Wm. H., Johns Hopkins University, Balti- West, Gerald M., Clark University, Worcester, Mass. hem, Pa. 101 THE MAYA GRAPHIC SYSTEM. Hil- 104 103 AUGUST 19, 1892. THE SINGLE COPIES, TEN CENTS. New Method of Protecting Property from Lightning. American Bell Telephone The Lightning Dispeller. COMPANY. 95 MILK ST., BOSTON, MASS. This Company owns the Letters Patent granted to Alexander Graham Bell, March 7th, 1876, No. 174,465, and January 30, 1877, No. 186,787. Price, $20 to $30.-According to size. The Patent Lightning Dispeller is a conductor specially designed to dissipate the energy of a lightning discharge, -to prevent its doing harm,-placing something in its path upon which its capacity for causing damage may be expended. No recorded case of lightning stroke has The Transmission of Speech by Dispeller. So far as known, the dissipation yet been cited against the principle of the of a conductor has invariably protected under the conditions employed. Correspondence solicited. all known forms of ELECTRIC SPEAKING TELEPHONES in104 fringes the right secured to this 105 Company by the above patents, and renders each individual user of telephones, not furnished by it or its 110 licensees, responsible for such un 107 Entered at the Post-Office of New York, N.Y., as THE LABRADOR COAST. A JOURNAL OF TWO SUMMER CRUISES WITH NOTES ON ITS EARLY DISCOV- By ALPHEUS SPRING PACKARD, M.D., Ph.D. AGENTS WANTED. lawful use, and all the conse- The American Lightning Protection Company, quences thereof and liable to suit United Bank Building, Sioux City, Iowa. SCIENCE The Illustrated Popular Science Weekly. More than Five hundred of the leading scientific men and women of America have agreed to contribute to the paper during the coming year; and, as others are constantly joining in this move, to make the paper more valuable than ever, it cannot be long Macoun, of Ottawa, Canada, has prepared the list of before there will be a body of over one thousand competent users of this weekly medium of scientific discussion. Sportsmen and ornithologists will be interested in which has been kindly revised and brought down to date by Dr. J. A. Allen. Dr. S. H. Scudder has con tributed the list of butterflies, and Prof. John Labrador plants. Much pains has been taken to render the bibliography complete, and the author is indebted to Dr. Franz Boas and others for several titles and important suggestions; and it is hoped that this feature of the book will recommend it to collectors of Ameri cana. It is hoped that the volume will serve as a guide to the Labrador coast for the use of travellers, yachtsmen, sportsmen, artists, and naturalists, as well as those interested in geographical and historical studies. 513 pp., 8°, $3.50. N. D. C. HODGES, See last page of this number. 874 BROADWAY, NEW YORK. 874 Broadway, NEW YORK. The American Geologist for 1892. Edited by PROF. S. CALVIN. University of Iowa; DR. E. W. CLAYPOLE, Buchtel College; JOHN EYERMAN, PERIODICALS. "The Magazine for Hot Weather." THE REVIEW OF REVIEWS Is "A Summer Magazine" BECAUSE "If one has only ten minutes every day to read, he can keep thoroughly posted on the events of the whole world by reading this valuable publication."-Seattle Press-Times. BECAUSE "It is illustrated lavishly and well and is indispensable."-Congregationalist. BECAUSE -"It is the best medium through which a busy man can keep abreast."--Chauncey M. Depew. BECAUSE "The 'Review of Reviews' is always interesting."-N. Y. Sun. BECAUSE "The usual bright and tren chant analysis of literary novelties furnishes ideas for people who have none of their own."-New York Commercial Advertiser. BECAUSE-It makes a Summer Price of FIVE MONTHS FOR ONE DOLLAR. Walker Prizes in Natural History. The Boston Society of Natural History offers a first prize of from $60 to $100 and a second prize of a sum not exceeding $5, for the best memoirs, in English, on the following subject: CONTRIBUTIONS TO OUR KNOWLEDGE OF THE LIFE-HISTORY OF ANY PLANT OR ANIMAL. Each memoir must be accompanied by a sealed envelope, enclosing the author's name and superscribed by a motte corresponding to one borne by the manuscript, and must be handed to the Secretary on or before April 1, 1893. Prizes will not be awarded unless the memoirs are deemed of adequate merit. For further particulars apply to SAMUEL HENSHAW, Secretary. BOSTON, July 26, 1892. THE OBSERVER. Published Monthly at Portland, Conn. A MEDIUM OF INTERCHANGE OF OBSERVATIONS FOR ALL STUDENTS AND LOVERS OF NATURE. E. F. BIGELOW, Editor and Publisher. ASSOCIATE EDITORS: M. A. BOOTH, F.R.M.S., Microscopy, Longmeadow, Mass. A. W. PEARSON, Entomology, Norwich, Conn. Yearly Subscription, $1. Minerals, Rocks, Fossils, Casts of Fossils, Geological Relief Maps. F. P. GORHAM, Geology, 103 Knight St., Providence, R. I. Ward's Natural Science Establishment Mineralogy, Geology, Paleontology, Zoology, Osteology, Anatomy. Send for Circular. ROCHESTER, N. Y. Stuffed Animals and Skins, Mountea Skeletons, Anatomical Models Invertebrates |