The Technical World Magazine, Volume 23 |
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Page 17
Wireless telegraphy was possible before wireless telephony , " said Mr. Hewitt , " because the first instruments invented to create a high frequency gave off their waves in ' trains , ' or series of four or five waves each , and there- ...
Wireless telegraphy was possible before wireless telephony , " said Mr. Hewitt , " because the first instruments invented to create a high frequency gave off their waves in ' trains , ' or series of four or five waves each , and there- ...
Page 18
Thirty - three of the thirty - five members of the Rose- crans ' crew went down , the surviving two being rescued only at the repeated risk of the lives of two United States life - saving crews , hundreds of persons watching the.
Thirty - three of the thirty - five members of the Rose- crans ' crew went down , the surviving two being rescued only at the repeated risk of the lives of two United States life - saving crews , hundreds of persons watching the.
Page 21
Rather , this date marks the first raising of a war budget toward the preparation of war plans - the appro- priation of five thousand dollars by Congress to finance surveys . Of course the mouth of the Columbia had been previously ...
Rather , this date marks the first raising of a war budget toward the preparation of war plans - the appro- priation of five thousand dollars by Congress to finance surveys . Of course the mouth of the Columbia had been previously ...
Page 25
... 60,000,000 horsepower , represent between them from five to seven per cent of the power of all the rivers of the world , the latter being estimated at from 850,000,000 to 1,200,000,000 horsepower . Niagara is the only one of the ...
... 60,000,000 horsepower , represent between them from five to seven per cent of the power of all the rivers of the world , the latter being estimated at from 850,000,000 to 1,200,000,000 horsepower . Niagara is the only one of the ...
Page 51
This is a photograph of the front window of a drug store on Seventh Avenue near Twenty - ninth Street , not five minutes ' walk from the famous intersection of Forty - second Street and Broad- way . The signs are in five different ...
This is a photograph of the front window of a drug store on Seventh Avenue near Twenty - ninth Street , not five minutes ' walk from the famous intersection of Forty - second Street and Broad- way . The signs are in five different ...
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