In connection with the photometric and other experiments requiring a constant potential, a storage battery of 60 cells is available. The instrument rooms are all supplied with solid masonry piers for the mounting of sensitive instruments.

The hydraulic laboratory has recently been fully equipped. An artificial head of water is available for tests upon impulse wheels. Two experimental water wheels, each of 50 H. P. capacity, with interchangeable buckets and completely equipped with absorption dynamometers, are available for efficiency tests. A stand-pipe, giving various heads up to 60 feet, is used for experiments requiring constant heads. The laboratory equipment includes a number of standard weirs for the accurate measurement of water used in the tests of water wheels, turbines or the discharge from centrifugal pumps under test.

Civil Engineering Equipment. The department has an excellent assortment of models and specimens of trade products. It has a museum of engineering materials and apparatus; also a department library containing engineering reports and specifications of actual work, trade catalogues, and a large assortment of photographs and blue prints of existing European and American structures. These collections may be consulted by students and instructors. They are also drawn upon for illustration in the class A collection of photographic lantern slides of engineering structures is in use by the department and represents mainly the fields of structural engineering, foundations, testing of materials, railroading, sanitation, irrigation, roads and pavements, surveying and masonry structures.

room.

For purposes of instruction in the regular session at Berkeley and at the Summer School of Surveying held near Santa Cruz, the department has a supply of surveying and geodetic instruments. It has also a collection of drawing and computing instruments such as planimeters, specialized slide rules and railroad curves, for the use of upper division students.

Civil Engineering Laboratory. The Testing Laboratory is fitted with apparatus to determine the elasticity and resistance of the materials used in engineering construction and for the inspection of cements and manufactured products. Testing machines of large capacity are available for practical tests of beams and columns. Facilities are offered for original investigation of the physical properties of the materials of engineering. The laboratory is provided with a well equipped machine shop for shaping test specimens of metal or wood and for the manufacture of special apparatus. Materials and building stones of the Pacific Coast receive special attention in the laboratory.

The Sanitary and Municipal Laboratories of the Department afford facilities for routine and research work on problems relating to the

determination of chemical, bacteriological and physical properties of water, sewage, air, municipal refuse. Apparatus is available for special studies of rainfall rates and run-off in streams and sewers. Practical problems in hydraulics, water and sewage purification, municipal refuse disposal and ventilation either can be studied in the laboratories or solved elsewhere with the use of the laboratory equipment. Special opportunities for tests upon materials for road and pavement construction are also offered.

The Hearst Memorial Mining Building, now occupied by the department of mining and metallurgy of the University of California, is the gift of Mrs. Phoebe A. Hearst, as a memorial to her husband, the late United States Senator George Hearst. From east to west the building measures one hundred and eighty-one feet. Its greatest length from north to south is two hundred and twenty-seven feet. It is of fireproof construction throughout. The outer walls are constructed of brick on the interior and of Raymond granite from the Sierra Nevada on the exterior. The frame is steel; the floors are of reinforced concrete; and the roofs are of the same material covered with red tile.

The building includes four working floors. The principal entrance is in the center of the south façade. This opens into the Memorial Vestibule and Museum, forty feet wide by eighty feet long. lighted on the southern side by three arched windows, and from above through three eircular domes fifty feet above the floor. The vestibule runs through three stories in height and is surrounded by balconies at the level of the second and third floors. It is finished throughout in buff pressed briek, with marble pavements.

The floors of the building are sixteen feet apart, giving practically fourteen feet of working space on each floor, and leaving ample room for the construction of mezzanine floors in the laboratories whenever needed.

The First Floor is a large and well lighted basement, entered from the west by a tunnel, through which heavy trucks may be driven directly to the storage and supply rooms. It contains steam heating and ventilating appliances, and there is now installed a 15-horsepower electrically driven air compressor and a 100-horsepower compound duplex air compressor driven by a condensing steam engine, both of the Cincinnati gear. Compressed air is now supplied continuously to all working parts of the building by the 15-horsepower compressor; the larger machine supplies power for the operation of air drills in the mining laboratory. These two air compressors serve to familiarize the students with standard appliances and methods of supplying compressed air for power in mining. On this floor are two large store-rooms carefully designed for the storage in a systematic manner of the varied chemicals and other

supplies used in the building. One of these rooms is devoted exclusively to chemicals, crucibles, muffles, and other supplies and appliances used in the assaying laboratory. The other is devoted exclusively to the storage of mining and metallurgical machinery and apparatus, where they may be free from chemical fumes.

Each of these store-rooms is served by a separate electric elevator, by means of which supplies are distributed to local distribution points connected with each of the four laboratory suites of the upper floors.

On this floor, adjoining the store-rooms, are two sets of very convenient locker rooms and lavatories with shower baths; separate suites being provided for the Senior and Junior mining students respectively.

In the heart of the building on this floor is the Mining Laboratory. This room is 64 feet high and about 50 feet wide by 120 feet long. It is surrounded by galleries on the second and third floors. It is lighted both from the sides and from above. It is provided also with an electric elevator capable of carrying a load of five tons. Its entire length will be covered by a traveling electric crane with a capacity for handling five tons.

To the right and left of this room on the ground floor are wings, arranged like the arms of a Roman cross. In the right wing are the forge-rooms, provided with down-draught forges for the working of iron and steel, particularly equipped for miners' drill and tool sharpening. On the left are the metal and wood working shops. These shops serve not only for the instruction of students, but as well for the equipment and experimental work of the department.

In the mining laboratory, with its adjuncts, there will be instruction in the methods of rock-drilling, both single and double hand; machine rock drills of every type will be used; and practical instruction will be given in the use of diamond and artesian drill boring tools, together with some experimental work with the leading types of hoisting and ventilating machines.

From a central switchboard on this floor the electric service of the building is distributed. The working rooms of the building are provided with compressed air, water, steam, gas, and electricity. The large motors in the building are driven by a two-phase alternating current, at a pressure of 440 volts. The lighting of the building is provided for by a 220-volt single-phase alternating current. There is also available for the elevators a 220-volt or if desired a 110-volt direct current.

It will be seen from the foregoing that the principal methods of electric power service are illustrated in the equipment of the building.

Second or Main Floor. The entrance to the second or main floor is in the center of the south façade, and opens into the memorial vestibule and museum of mining and metallurgy. This noble room measures

40 x 88 feet, and rises through three stories to a height of 50 feet. The room is beautifully lighted from the side and from above. Surrounding this room are balconies at the level of the third and fourth floors.

In this museum it is intended to illustrate all phases of the mining and metallurgie art. It will contain plans and models of mines and mining and metallurgical machinery, and collections illustrating the various stages of ore-dressing and metallurgical processes, from the raw material to the finished product.

Opening off the museum, on the second, third, and fourth floors, there are three large lecture rooms, and a number of offices, studies, and reading rooms. A comfortable and well lighted reading room second floor is provided for the use of Senior and Junior mining students.

on the

The assaying laboratory opens off the right of the museum, forming the east wing of the building on the second floor, and contains six large rooms fitted up to illustrate the use of assay furnaces of different standard types, including soft coal, coke and gasoline furnaces.

In the left or west wing of the building is a similar suite of rooms, devoted to work on an experimental scale in concentration, chlorination, and amalgamation of gold and silver ores; to hyposulphite lixiviation and to cyanide work.

In the rear end of the building is a tower 50 feet square, extending up through three stories, from the second to the fourth, devoted to the dry crushing and sampling of ores. This room contains several sets of rock crushers, a pair of Krom's 16-inch swinging pillow block steel rolls, a Sturtevant centrifugal mill, a Krom's fine grinder and several sample grinders, together with a bucket elevator, a Krom hexagonal trommel and set of shaking sizing screens. The highest floor of this tower contains a number of ore bins and shelves for stock of ore samples, and a fine sampling floor. The three floors of the rock crushing tower are connected by an elevator, giving ready access to all parts thereof.

To the right of the dry crushing and sampling tower, and adjoining the Assaying Laboratory, is a large smelting laboratory which will be devoted to various types of roasting and smelting furnaces.

To the left of the dry crushing and sampling tower is a large room extending up through three stories, devoted to the wet crushing and amalgamating of gold, silver, copper, and lead ores.

Third Floor. Connecting the front and the rear end of the building on the third floor are, on the right side, six large rooms directly over the assaying laboratories, which will be devoted to advanced work in metallurgy by Senior mining students. On the left is a similar suite of six rooms devoted to research work.

Fourth Floor. The fourth floor of the building will be used as a large steel stack room containing a reference library of mining and metallurgy, and two suites of five rooms each, lighted from above, will serve as draughting, designing, photographic and blue printing rooms.

The building cost over $600,000; the present equipment represents an outlay of at least $100,000. When completed the building and equipment will represent an outlay of at least a million dollars.

The Laboratories of Agricultural Chemistry, Soil and Cereal Investigations, Viticulture, and Zymology are located in the Agricultural Experiment Station Building, and that of Plant Pathology, Bacteriology and Veterinary Science, of Fertilizer Control, of Entomology, and for experiments in milling and oil making are in adjoining structures.

A special Laboratory is devoted to investigations in the physics and chemistry of soils, and to instruction in the Chemistry and Physics of Soils.

The Laboratory of Agricultural Chemistry is devoted primarily to the prosecution of chemical researches in relation to general agriculture, such as the chemical examination of waters, foods, agricultural products, etc., and the determination of technical questions relating to agricultural processes or manufactures. The results of this work are reported to the persons interested; so far as they are of general interest, they are published currently in the form of bulletins. Laboratory instruction has been provided by desk room in the laboratories for twenty-five advanced students (i.c., those who have taken silicate analysis in the chemistry department) and for special students for work in agricultural analysis.

The Offices of the. Department of Irrigation Engineering are located on the upper floor of the building.

The Fertilizer Control Laboratory, for the analysis of commercial fertilizers, established by Act of the Legislature, occupies a new building planned and constructed especially for its use. In an addition to this building is located the State Pure Food Laboratories.

The Cereal Laboratory is equipped for work entrusted to the Experiment Station by the Governor of California under the law of 1905, and is associated with field work at cereal stations in different parts of the State. The laboratory operations consist of selection and analysis of cereals, and analysis of soils and fertilizers used in their production; also baking tests to determine commercial value and suitability of the flours secured from the varieties included in field and milling experiments.

Sugar-House Practice is maintained by facilities for practical instruction in sugar-house control, in which the student receives practice in the analysis of sugar-house products.