MAN’S SUBMARINE WORK. 883 
which readily suggest themselves to careful readers. 
But, there is a limit to the field of the most 
expert diver, and with the best of preparation. As 
he deseends in the water,the pressure upon him 
constantly increases, it is estimated, at the rate of 
one atmosphere for every thirty-two feet of depth, 
so when he is down thirty-two feet, he is subjected 
to a pressure of two atmospheres; at sixty-four feet 
the pressure is three atmospheres and so on. When 
he reaches a depth of two hunderd feet the press- 
ure is so great that he becomes dizzy, the blood 
gushes from his nostrils and he becomes insensible. 
It is found that the depth of one hundred and eighty 
feet is the lowest in which a diver can operate with 
success. 
The ocean has always been a formidable barrier 
obstructing man’s progress in subduing Earth, but 
modern thought, industry and science are daily 
overcoming difficulties seemingly insurmountable. 
Human ingenuity has made a pathway for the 
lightning through the midst of the deep, and thus, 
at one gigantic sweep annihilated the world of wa- 
ters which so long had hindered the intercourse of 
nations. How simple the matter when once accom- 
plished. A wire laid upon the bottom of the sea, 
and a thimble full of acid, and time and distance 
and oceans are as nothing. 
Such vast results have followed the achievement 
of laying the Atlantic cable, and the public heart 
was so thrilled with the success, that cable and 
ocean have ever since seemed to be parts of each 
other. One bears precious friends, goods, wares and 
