World's Fair Notes

Mr. Tesla is expected to return to Chicago the later part of this week and will then conduct in person some of the high frequency experiments which have made him so famous. The Westinghouse dark room will be used for the displays, but no definite time has yet been fixed.

The Hertz reflectors, which have been promised some time, are now shown in operation in the exhibit of Queen & Co. The reflectors are parabolic in form and when an oscillatory discharge of a high potential current takes place at the focus of one, the effect is reproduced at the focus of the other. 

The Westinghouse company has placed a glass floor in one of the cars exhibited in the railway department so that the operation of the motor can be easily seen from above. The Columbus egg, which has proven such an attraction to the Westinghouse space, is now shown the first fifteen minutes of every hour from 3 until 10 p. m.

Visitors to the Electricity Building have found a new attraction in the Hoggson time stamp which has recently been placed in the exhibit of the E. S. Greeley Co. The stamp shows the date and time of day and the machine is electrically connected with a clock so as to change the time indicated every minute. On account of its many commercial uses the device is attracting considerable attention.