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(27) Blaðsíða 17 (27) Blaðsíða 17
( 17 ) no means follows as their length : beyond a certain length the speed decreases in greater ratio than their length increases : this is a established fact, proved over and over again. Professor Hughes, amongst others, tried this on the Red Sea cable while it lay at Birken- head. Through 500 miles he got 20 words, at 1000 miles he got only 8 words, and through 1700 miles 4 words per minute : this too was through good cable, not yet left the manufacturer; so that if 20 words can be obtained through 500 miles, it does not by any means follow that even three words can be worked through 2000 miles. But these are only the results obtained on a trial; the working results would be widely different. If three words could be worked on a cable 2000 miles long before submersion, or even after submersion on a trial, allowing for delays, interruptions, and continually re- peating, to secure accurate transmission (nearly every word would require repeating), the speed would not average more than, if so much as, one word per minute. On a 500 mile circuit, with 200 per cent, less delays and interruptions than on the 2000 mile cable, although 20 words could be obtained through it, it would not average a working speed of more than from 12 to 14 words per minute. * It is asserted that a new cable 2000 miles long can be so con- structed as to obtain five words per minute through it. I do not doubt it. It is an admitted fact that as much as three words were obtained through the old Atlantic cable, after submersion for a few minutes together; but the question is not what may on experiment be obtained through the cable, but what is the real speed at which messages will be transmitted and paid for. No matter how per- fectly a cable is made—2000 miles long,—if a calculation be made of the amount in money which one word per minute comes to, and take a year’s income of that cable at that rate and compare the two amounts, it will be found that the income did not reach within several thousand pounds of the total amount which would have been ealized had one word a minute been worked and paid for. Those who assert that five words per minute can be obtained through 2000 c
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The Atlantic ocean telegraph

Ár
1860
Tungumál
Enska
Blaðsíður
52


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