ASTRONOMY. 167 



latitudes and longitudes, etc. It is also designed to encourage study, 

 on tlie part of the more advanced nnder-graduates, of astronomical 

 phenomena, as far as they may be within the reach of young amateurs. 



A neat and sufficiently commodious observatory building, 50 feet long 

 by 20 feet wide, on the average, has been built on a knoll in the univer- 

 sity grounds 320 feet above mean sea-level. In the douie-room, at the 

 east end of the observatory, is an equatorial refractor of GJ inciies clear 

 aperture, objective (achromatic), by J. Byrn, of New York, the mount- 

 ing, driving-clock, pier, etc., being l\y Fauth & Co., of Washington. 

 With this telescope are six negative and as many more jiositive eye- 

 pieces, and a fine position filar micrometer made bj' the same firm. A 

 si)ectroscope, capable of attachment to the equatorial or of being used 

 on a stand, is furnished with a Hint i)rism, and also with one of Row- 

 land's diffraction gratings, having 14,334 lines to the inch. 



In the room next west are two of J. Green's standard barometers, and 

 in a. specially prepared shed upon the north side, a wet bulb, a dry bulb, 

 a maximum, and also a minimum thermometer, by H. J. Green, of N^ew 

 York. In this shed is also placed one of Draper's self-registering "ther- 

 mographs." 



On the northwest tower of the College of Letters are mounted a Rob- 

 inson anemometer and a wind- vane. These instruments are connected 

 by telegraph wires with an anemograph in the observatory, where the 

 velocity and direction of the wind are automatically recorded. IMeteor- 

 ological observations and records are made at 7 A. M., 2 p. M,, and 9 P. 

 M. (standard or mean time of the i20th meridian of longitude). Monthly 

 printed reports are made to the U. S. Signal Service office in San Fran- 

 cisco. 



In the next room west is mounted a fine, large, portable '' transit and 

 zenith telescope," of the type used by the U. S. Coast and Geodetic 

 Survey, but having an objective 3 inches in diameter. 



Two diagonal and two direct eye-pieces belong to this instrument. 

 In the same room is a Howard Standard mean time clock, with grav- 

 ity escapement, mercurial compensating pendulum, and electric circuit 

 connections. The clock is fastened to a solid gianite pier IS inches 

 square and G feet long, which is inclosed in a brick ])ier reaching to solid 

 rock 5 feet below the surface of the ground. The transit and eipuitorial 

 are similarly founded. All the piers are disconnected from the floors of 

 the observatory. A sidereal chronometer, made by Negus Bros., New 

 York, is mounted upon one side of the transit pier. 



On a shelf at one side of the transit-room is an electro chronograph, 

 by Fauth & Co., of Washington, and on another the switch-board made 

 by the San Francisco Electric Company. An electric circuit runs 

 through the clock, chronometer, chronograph, sounder, and relay, and 

 also into the equatorial-room, from which time may be marked on the 

 chronograpli by means of a break-circuit key. The switch-board is con- 

 nected witli the Western Union telegraph line by a shortline to Dwight 

 Way-Station, Berkeley. 



