Mathematical Models. The department of Mathematics has a collection of about three hundred models of mathematical curves and surfaces in plaster, thread, wire, wood, and celluloid, including the Brill collection and the Schroeder models of Descriptive Geometry.

Botany. The botanical collections of the University contain the following:

I. A Phaenogamic Herbarium of over one hundred thousand sheets of mounted specimens and fully as much unmounted material. which is gradually being incorporated. 1918

The nucleus of this herbarium was formed by a set of the plants collected on the State Geological Survey, from 1860 to 1867. To this have been added: (1) a number of important herbaria and many smaller collections donated by alumni and other friends of the University, (2) specimens collected by members of the Botanical Department, amounting to several thousand sheets each year, and (3) plants received as a result of exchanges carried on with other institutions. While the aim has been to bring together plants from all parts of the world, particular attention has been given to the Pacific Coast flora, which is especially well represented in this herbarium.

Furthermore, there has been acquired by gift during the last twenty years a large number of important collections, among them the herbaria of Mr. and Mrs. T. S. Brandegee, of Mrs. R. W. Summers (presented by Regent Phoebe A. Hearst), of Prof. W. C. Blasdale, of Prof. E. R. Drew, of Prof. V. K. Chesnut, of Mr. J. H. Barber, and many thousands of specimens from the resident collectors of California, Oregon, and Washington.

II. A Cryptogamic Herbarium, containing twenty-one thousand sheets, particularly illustrating the California species. The collection of Algae and the considerable collections of other groups of Cryptogams of Professor Setchell have been incorporated with the University collections and are now available to students in these lines.

III. A Botanical Museum containing at present a valuable collection of native woods, fibres, barks, cones, acorns, and fruits, besides a large number of drugs and an economic collection. This material is available for class and research work, and is constantly being added to by donations from all parts of the world.

Zoology. The department of Zoology has an excellent collection of both invertebrates and vertebrates, which is being constantly augmented. The collections of marine invertebrates from the Pacific Coast, especially of the groups of marine protozoa, coelenterata, bryozoa, echinodermata, annelida, mollusca, crustacea, and tunicata, are large and are being rapidly increased. In entomology the Agricultural Department possesses a collection of over two thousand well determined species of beetles and a large collection of lepidoptera. The collections of amphibia, reptilia, birds, and mammalia are fairly representative of the West North American fauna in these groups. A special teaching collection of the local hd fauna has been recently secured. The collection of vertebrate skeletons has been greatly enriched by the addition of about fifty new types, which were selected with the view to supplement the forms already possessed. The collection is fairly complete for the purposes of general instruction in comparative anatomy.

The California Museum of Vertebrate Zoology, provision for which has been made by Miss Annie M. Alexander, will, it is confidently expected, give the University by far the most complete collection of the West American land fauna that has hitherto been brought together. The field work has already been begun and is being pushed with vigor. It is the intention that these collections shall be made useful in the widest possible way both for research and general instruction.

Palaeontology. The collections of the Geological Survey, which have become the property of the University, contain either the types or representative specimens of nearly all the known California fossils. In addition to this, the palaeontology of the State is illustrated by a collection of splendidly preserved fossils, presented to the University by Hon. D. O. Mills.

A large collection represents fully the development of invertebrate life in North America.

As the result of the work of several palaeontological expeditions sent out by friends of the University, there has been brought together a large collection of vertebrate fossils representing fully the extinct fauna of this coast.

A number of valuable invertebrate and vertebrate fossils have been donated to the University during the last year.

The Museum of Geology and Mineralogy comprises an extensive suite of minerals and ores illustrating the chief phenomena of crystals

and of economic deposits. There are, besides, many crystallographic models, and relief maps geologically colored. There is a similarly extensive suite of petrological specimens affording a fairly good illustration of the subject of Petrology; and many specimens illustrative of the more interesting features of structural geology.

Agriculture. A collection of more than two thousand specimens of the soils of this State, to which frequent additions are made, fully illustrates the character of the several agricultural regions of California. This material forms the basis for continuous investigations in the agricultural laboratory. It includes also a large number of complete vertical sections of typical soils of the State taken to depths of ten and twelve feet, each foot being separately shown. A general collection of seeds is being formed, for the purpose of study as well as of a seed-control station.

By Act of the Legislature the College of Agriculture received on January 1, 1896, the collection of viticultural and enological apparatus and the library gathered during fourteen or fifteen years by the State Viticultural Commission.

Donations to the museums of the University are gratefully received. Messrs. Wells, Fargo & Co. will transport such gifts to the University gratis if the weight of the package does not exceed twenty pounds. Special instructions for collecting and forwarding any particular kind of material will be furnished to any who may desire them.

LABORATORIES.

The Psychological Laboratory is well equipped for instruction and for research. The entire second and third floors and part of the basement of the Philosophy Building are set apart for this use. The laboratory contains a demonstration room furnished for class instruction, which can be darkened when necessary, and an office used also for conferences. For research and special demonstrations there is an optical room, provided with north light; a special dark room, which may also be used as a silent room, being protected with double walls, floors, and doors; an acoustical room, with a specially devised contrivance for the direct transmission of sound to the silent room; and three other rooms, which can be adapted to any special problems. In addition to these, there is an

apparatus room, a photographic room, a battery room, and a shop in which those working in the laboratory can construct the simpler contrivances for special research.

Besides its own batteries, the laboratory is connected with the central electric power-plant of the University; and a switchboard having terminals of from four to eight wires in each of the above rooms makes electric power from either source available in any part of the laboratory. In addition to this, an independent circuit provides light throughout the building.

The equipment includes the more important psychological instruments, of late pattern, from the best makers. There is also a good collection of models, casts, and charts, of the brain and the sense organs, and a full assortment of materials for demonstration and experiment.

The Physical Laboratory occupies the entire basement floors of South Hall and East Hall, and thus secures favorable conditions as regards stability and evenness of temperature. There are set apart rooms for elementary and for advanced work, for photometry, for spectroscopic research with a Rowland grating, for dynamos, and for a workshop. The apparatus includes many instruments and standards for fundamental measurements from makers of the best reputation, and the laboratory employs a competent mechanician, who is continually increasing the equipment from original designs. It offers good facilities to students who wish to pursue the study of physics beyond the limits of the prescribed courses, whether for the sake of physics itself, or in connection with other subjects, like electrical engineering, astrophysics, the practical uses of polarized light, and physical chemistry. Such students may make special arrangements for using the laboratory.

The Students' Observatory (Berkeley Astronomical Department). The equipment of the observatory consists of the following instruments: An eight-inch reflector, gift of the Hon. Wm. M. Pierson; a six-inch refractor with position micrometer; a five-inch refractor, gift of Mr. and Mrs. Herman Oelrichs; a six-inch photographic telescope and a five-inch photographic telescope with a three-inch guiding telescope, all equatorially mounted with driving clocks; a three-inch Davidson combination transit-and-zenith telescope; a two-inch altazimuth instrument; a spectroscope; a Repsold measuring engine for measuring astronomical photographs; a Gaertner microscope for measuring spectrograms; an electro-chronograph; a Harkness spherometer; a level-trier; six sextants; three

chronometers; a Howard M. T. clock; all the necessary electric connections for recording time and determining longitude by the telegraphic method; a set of meteorological instruments with which observations are regularly recorded and forwarded to the United States Weather Bureau in Washington, D. C.; two seismographs, having both time and electric connections, one of the Ewing type, and one duplex; one Omori tromometer.

For particulars concerning the organization and aims of the undergraduate and graduate instruction in the various branches of astronomy in the Berkeley Astronomical Department, consult the "Special Announcement to Students,'' issued in 1901 by the Lick and Berkeley Astronomical Departments.

Visitors are received at the Students' Observatory on the first Friday of each month, in the evening from eight to ten o'clock.

The Lick Observatory. (See Lick Astronomical Department.) The Chemical Laboratories are large and commodious, well lighted and well ventilated, and offer excellent facilities for the study of chemistry. They comprise the following: An Elementary Laboratory for beginners; a Qualitative and a Quantitative Laboratory, each containing all the usual appliances; an Organic Laboratory for special and advanced studies in organic chemistry; a wellequipped laboratory for Physical Chemistry; a laboratory for Physiological Chemistry; and two large Research Laboratories. Special rooms are devoted to volumetric analysis, gas analysis, spectrum analysis, and electrolysis. Ample facilities are provided for chemical analysis and for investigations in foods, drinking waters, mineral waters, poisons, etc. A chemical museum, with a large collection of chemical products and apparatus, is open daily for inspection and study.

A Botanical Garden furnishes abundant material for the classes in botany, and affords favorable opportunities for original studies and experimentation. About three and one-half acres are under cultivation. Over two thousand species of plants, one-half of these California species, are being grown, and this number is being constantly increased through the donations of friends and the efforts of the various members of the Botanical Department.

The Botanical Laboratories are well lighted and equipped with the necessary instruments and reagents for work in morphology, histology, and physiology both of flowering and flowerless plants. Special facilities are provided for students desiring to pursue research work.