Part of PICRYL.com. Not developed or endorsed by the Library of Congress

district of columbia

glass negatives

library of congress

radio

radio impulses

radio station

radio waves

carnegie

carnegie institution

radio waves travel

public
2 media by topic ∙ page 1 of 1
Radio waves high flyers, Washington, D.C., Oct. 1. Experiments conducted by H.W. Wellex at the radio station of the Carnegie Institution have proven that radio waves travel a distance of 80 miles heavenword before they are reflected back to earth. Traveling like lightning as they ascend in to the ionosphere the radio impulses have to be measured in 10,000ths of second to accurately check the height reached before they return to the radio set

Radio waves high flyers, Washington, D.C., Oct. 1. Experiments conduct...

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Radio waves high flyers, Washington, D.C., Oct. 1. Experiments conducted by H.W. Wellex at the radio station of the Carnegie Institution have proven that radio waves travel a distance of 80 miles heavenword before they are reflected back to earth. Traveling like lightning as they ascend in to the ionosphere the radio impulses have to be measured in 10,000ths of second to accurately check the height reached before they return to the radio set

Radio waves high flyers, Washington, D.C., Oct. 1. Experiments conduct...

A black and white photo of a man standing in front of a machine, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. Harris and Ewing photo. Date ... More