Fig. 73. {upper) The central win^-bolt is Icxjicncd and slowly turned, and almost at once 

 water begins to drip out, the hissing increasing. Fig. 74. {lower) As the wing-bolt turns, 

 more and more water escapes, and the hissing rises to a high scream. On the chance that 

 the pressure might be dangerous, the deck is cleared of people, and the photographer placed 

 far to one side. 



