PROTO-BATHYSPHERES 5 1 



Other end loosened, the thing may be safely sent out with- 

 out the admission of any water. 



"So again, when anything is to be taken in, it must be 

 first received into that part of the bag towards the win- 

 dow, which being (after the thing is within it) close tyed 

 about; the other end may then be safely opened. It is 

 easee to conceive, how by this means any thing or person 

 may be sent out, or received in, as there shall be occasion; 

 how the water, which will perhaps by degrees leak into 

 several parts, may be emptied out again, with divers the 

 like advantages. Though if there should be any leak at 

 the bottom of the Vessel, yet very little water could get 

 in, because no air could get out. 



"2. The second difficulty in such an Ark will be the 

 motion or fixing of it according to occasion; The direct- 

 ing of it to several places, as the voyage shall be designed, 

 without which it would be very useless, if it were to re- 

 main only in one place, or were to remove only blindfold 

 without any certain direction; And the contrivance of 

 this may seem very difficult, because those submarine 

 Navigators will want the visual advantages of winds and 

 tides for motion, and the sight of the heavens for direc- 

 tion. 



"But these difficulties may be thus remedied; As for 

 the progressive motion of it, this may be effected by the 

 help of several Oars, which in the outward ends of them, 

 shall be like the fins of a fish to contract and dilate. The 

 passage where they are admitted into the ship being tyed 



