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DR. KARL TINSLEY WAUGH, Psychology.
ASSOCIATE PROFESSOR SOLOMON HENRY CLARK, Public Speaking.
LESTER BARTLETT JONES, Music.
PROFESSOR Amos Alonzo Stagg, Physical Culture.

GENERAL STATEMENT The General Library is for the use of students in all departments of the University. Students who have matriculated and paid their library fee may take at one time three volumes from the General Library. These may be kept two weeks, and at the end of that time, if desired, may be renewed for two weeks. Former students may continue to use the library by the payment of the library fee of $2.50 per quarter.

The General Library is located in the Press building, on the northwest corner of Fifty-eighth Street and Ellis Avenue.

The number of books in the library is 491,481, distributed as follows: Baptist Union Theological Seminary Library, 40,000 volumes; the old University, 10,000; the Edward Olson Library, 5,000 (not yet delivered to the University); Berlin purchase, 175,000; (not yet entirely delivered); number of volumes in the General Library and Departmental Libraries, April 1, 1909 : Astronomy, 1,026; Biology, 18,202; Campanology, 14; Chemistry, 2,637; Classical Group, 17,568; General Library (special collection books not included), 59,254; Geography and Geology, 7,463; Haskell, 18,366; Historical Group, 53,301; Law School, 28,959; Lexington Hall, 853; Mathematics, 3,995; Modern Language Group, 36,107; Music, 224 ; Physical Culture, 925; Physics, 2,723; Psychology, 209; Public Speaking, 401; School of Education, 9,251. Total, 491,481 volumes.

The General Library receives 1,524 current periodical publications, includ. ing the transactions and proceedings of learned societies. All the branch and departmental libraries are catalogued and classified. Most of the collections in the General Library are now permanently arranged.

THE KENT CHEMICAL LABORATORY

JOHN ULRIC NEF, Director The Chemical Laboratory, provided by the generosity of Mr. Sidney A. Kent, was opened January 1, 1894.

The arrangement of the rooms is as follows:

The basement contains a furnace-room, with a set of gas furnaces, with air-blast of the most modern construction, for crucible work, muffle work, tube-heating, and other purposes; a constant-temperature room, a room fitted with steam and other appliances for work on a large scale, a mechanical workshop, and storage-rooms.

On the first floor are two large lecture-rooms, and a large lecture-hall seating three hundred persons, fitted for use as a chemical lecture-room, if desired. This floor also contains two rooms for physico-chemical work, one small preparation room, a room with northern exposure, especially fitted for use as a gas-analysis laboratory, and also apparatus and preparation rooms connected with the lecture-rooms.

On the second floor are two large laboratories intended for research and quantitative analysis; tbree private laboratories for the professors; balance, combustion, and air-furnace rooms; a balcony for out-of-door work; and the chemical library, which contains full sets of the most important journals, as well as the most important textbooks and other works, relating to chemistry.

On the third floor are three large laboratories for general and analytical chemistry, a storeroom, a preparation room, a room especially fitted for optical and photographic work, a balance-room, and two private laboratories. The most modern system of ventilation has been adopted, air of constant temperature being forced in by fans from below, and withdrawn by a fan above. The building is lighted throughout by electric lights, and the laboratories are provided with electricity adapted to every kind of electro-chemical work.

The fullest opportunity will be given for doing research work. All possible aid will be afforded those who desire to avail themselves of the facilities of the laboratory.

THE RYERSON PHYSICAL LABORATORY

ALBERT ABRAHAM MICHELSON, Director The Ryerson Physical Laboratory was completed January 1, 1894. In the design and construction of this building no element of utility has been omitted, and every effort was made to include all the desirable features of a first-class physical laboratory.

All the walls and floors are strong and heavy; the laboratories on the first floor are provided with piers of masonry, in addition to the heavy slate wallshelves which are found throughout the building. Every laboratory is provided with gas for light or fuel, electricity for light and power, water, compressed air, and vacuum pipes.

The first floor is devoted to laboratories for research work, two large constant-temperature rooms, and the mechanician's room, which is fitted up with all the tools and appliances necessary in the construction and repair of physical apparatus.

On the second floor are found a large general laboratory for advanced undergraduate work, optical laboratories, a chemical laboratory, a large dark. room, two developing-rooms, and the large lecture-hall with its adjoining apparatus and preparation rooms.

The third floor is devoted to a general laboratory for the undergraduate work in general physics, which with its adjoining apparatus and preparation rooms occupies the entire floor of the east wing. On the same floor are found two general laboratories and classrooms.

The central part of the fourth floor forms a hall for experiments requiring a large space. The roof above this portion is flat and suitable for observations in the open air.

Recent investigations have shown that the location of the Ryerson Labora. tory is an exceedingly good one and that the outside disturbances, which are usually so annoying, are at a minimum.

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THE YERKES ASTRONOMICAL OBSERVATORY

EDWIN BRANT FROST, Director The Yerkes Observatory was founded in 1892, through the munificence of the late Charles T. Yerkes, of Chicago. Its principal instrument is a refracting telescope of 40 inches' aperture, which is provided with a micrometer, a photometer, an attachment for direct photography of celestial objects, a stellar spectrograph, a solar spectrograph, and a spectro-heliograph.

The construction of the main building of the Observatory was completed in 1897. Its form is that of a Latin cross, with three domes and a meridian. room at the extremities. The principal axis of the building is about 330 feet long, with the dome for the 40-inch telescope at the western end. This dome is 90 feet in diameter, allowing ample space for the tube of the great telescope, which, with its attachments, is nearly 70 feet long. The elevatingfloor of the observing-room is 75 feet in diameter, and is movable through a range of 23 feet by means of electric motors.

One of the two smaller domes contains the 12-inch telescope formerly at the Kenwood Observatory, and in the other is mounted a 24-inch reflector. Between these domes is the heliostat room, 100 feet long by 12 feet wide.

The body of the building contains offices and computing rooms, a library, lecture-room, photographic laboratory, dark-rooms, chemical laboratory, instrument rooms, etc. In the basement are photographic rooms, a room containing a large concave grating spectroscope, spectroscopic laboratory, and machine shops. The engines, dynamos, and boilers for supplying heat and power are in the power-house at a distance of five hundred feet from the Observatory.

Much of the special apparatus needed for the researches conducted at the Observatory has been constructed in the well-equipped shops in the basement.

The Bruce Photographic Telescope, having two photographic doublets of 10 and 6 inches'aperture, with a guiding telescope of 5 inches' aperture, occupies a separate building near the Observatory.

The Snow Building, 600 feet north of the Observatory, contains a powerful horizontal spectrograph of the auto-collimation type, which is used for solar investigations.

The Observatory is situated one mile from the village of Williams Bay, on Lake Geneva, Wisconsin, in an ideal rural region, free from the dust and smoke of cities, and removed from the tremors of railroad traffic. Williams Bay is seventy-six miles from Chicago, and is reached by the Chicago & Northwestern Railway.

OPPORTUNITIES FOR STUDENTS

Advanced students in Astronomy and Astrophysics are offered opportunity to profit as far as possible by the instrumental facilities of the Yerkes Observatory. Those who are qualified for such work take part in the investigatious in progress at the Observatory. As soon as capacity for original research has been sufficiently developed, students are encouraged to under. take investigations of their own.

SPECIAL INVESTIGATORS

The facilities employed at the Yerkes Observatory for the prosecution of special researches in various fields of Astronomy and Astrophysics are in some cases of an exceptional nature. It has accordingly been felt that, so far as this can be done without interfering with the regular work of the members of the staff, opportunity should be given to men of science connected with other institutions to carry on special investigations at the Observatory. The Director has been authorized to extend invitations to undertake such special work to those who may seem likely to make good use of the opportunities thus afforded.

VOLUNTEER RESEARCH ASSISTANTS

It is frequently the case that teachers and students who have taken higher degrees in Astronomy, Astrophysics, or Physics, or have completed advanced studies in these subjects at the University of Chicago or some other institution, find it to their advantage to spend some time at the Yerkes Observatory, in order to familiarize themselves with its work. To meet this need the position of Volunteer Research Assistant has been established. Those who are appointed to this position are expected to carry on such work as may be assigned to them during their connection with the Observatory. They receive no pay for their services, but are given every reasonable opportunity to become acquainted with the investigations in progress, and in some cases to conduct researches of their own.

PUBLICATIONS OF THE OBSERVATORY

The work of the Observatory is at present principally published in the Publications of the Yerkes Observatory, in the form of quarto volumes containing detailed accounts of special researches; and in the Astrophysical Journal, edited by the Director of the Yerkes Observatory, with the assis. tance of eminent scientists, and published by the University of Chicago Press.

OBSERVATORY LIBRARY

The library contains sets of many of the astronomical periodicals, charts, star catalogues, annals of observatories, and numerous general works.

THE WALKER MUSEUM

THOMAS CAROWDER CHAMBERLIN, Director The Walker Museum is located in a fireproof structure provided through the munificence of Mr. George C. Walker. The collections are estimated to embrace over 1,000,000 specimens.

The general geological collection contains material illustrating structural phenomena and the modes of action of dynamic agencies; that of fossils includes a systematic series arranged on a stratigraphic basis, illustrating the successive faunas and floras; that of illustrative geographical material embraces a large series of models, maps, and photographs, illustrating the topography and geology of various countries; that of economic geology embraces a large series of ores and other mining products, representing the leading mining districts of the United States and of many foreign countries; that of mineralogy contains a systematic series of minerals arranged for the illustration of lectures and for public exhibition; that of petrography embraces igneous, sedimentary, and metamorphic rocks in systematic series, together with special collections of igneous rocks from a number of localities in western America and Europe. There is also on exhibition the private mineral collection of Mr. W. C. E. Seeboeck.

The anthropological collection contains a considerable quantity of ethnographic and archaeologic material. In addition to this the following collections are on deposit and furnish material for study: The Ryerson Collection in Mexican Archaeology, numbering more than 3,000 pieces. The Ryerson Collection from the Cliff-Dwellings and Cave-Houses of Utah; this is ac. companied by a series of photographs which add much to its educational value. These two collections are deposited by Mr. Martin A. Ryerson. The Clement Collection from Japan, containing art work in lacquer and porcelain, and an interesting series of articles used in the curious Doll's Festival. It is deposited by Professor E. W. Clement, of Tokio, Japan. The material collected by Frederick Starr among the Ainu of Japan and the native tribes of the Congo Free State is on display temporarily. During the year Mr. Joseph Duplissis has presented a plaster copy of an interesting carved slab from near Orizaba, Mexico; Mr. M. F. Rittenhouse has given a facsimile reproduction of a Lolo manuscript; Mrs. Mary J. Wilmarth has donated a series of life-size photographic portraits of natives of the Congo Free State, showing different tribal marks.

The investigative paleontologic collection of invertebrates contains a large amount of choice material, especially from the Paleozoic horizons, and includes a large number of type-specimens. The James Hall Collection, presented to the museum by Mr. J. D. Rockefeller, is rich in types and other specimens of the greatest value for study and investigation. Other important collections, which have become the property of the Museum, are the Gurley Collection, the James Collection, the Washburn Collection, the Krantz Collection, the Weller Collection, the Sampson Collection, the Faber Collection, the Haines Collection, the Tiffany Collection, the Bassler Collection of Bryozoa and Ostracoda, and the Van Horne Collection. The last of these is of especial interest because it consists largely of material from the local Niagaran formation of northeastern Illinois and southeastern Wisconsin. The collections of invertebrate paleontology have been increased by donations during the year from Mr. E. E. Teller, Professor J. A. Udden, Mr. L. P. Rowland, and Mr. Frank Springer.

The collections of vertebrate fossils include extensive series of the American Permian reptiles, Triassic reptiles and amphibians, Niobrara Cretaceous birds, reptiles, and fishes, with a considerable material from the Laramie Cretaceous and White River Oligocene. Several field parties during the past years have added numerous valuable and new forms available for investigative study.

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