American Nonconformist, April 25, 1895, p. 8. GIRL'S ELECTRICAL INVENTION Columbus, Indiana, April 22-An electric device has just been invented by Dora Ogden, manager of the Western Union office at this place, by which steam whistles are to be blown by electricity, the current passing through an electric clock. By this device every factory whistle in the city, or in the United States for that matter, can be sounded simultaneously. The whistle may be set to blow at any hour desired, and it is believed that many manufacturing establishments will adopt and use it.