50 PROTO-BATHYSPHERES 



cogitations into DiflSculties and Remedies, and Great Con- 

 veniences. 



The difficulties are generally reducible to these three 

 heads. 



"i. The letting out, or receiving in any thing, as there 

 shall be occasion, without the admission of water. If it 

 have not such a convenience, these kind of voyages must 

 needs be very dangerous and uncomfortable, both by rea- 

 son of many noisom offensive things, which should be 

 thrust out, and many other needful things, which should 

 be received in. Now herein will consist the difficulty, how 

 to contrive the opening of this Vessel so, that any thing 

 may be put in or out, and yet the water not rush into 

 it with much violence as it doth usually in the leak of a 

 ship. 



"In which case this may be a proper remedy; let there 

 be certain leather bags made of several bignesses, which 

 for the smaller of them should be both tractable for the 

 use and managing of them, and strong to keep out the 

 water; for the figure of them, being long and open at 

 both ends. Answerable to these, let there be divers win- 

 dows, or open places in the frame of the ship, round the 

 sides of which one end of these bags may be fixed, the 

 other end coming within the ship being to open and shut 

 as a purse. Now if we suppose this bag thus fastened, to 

 be tyed close about towards the window, then anything 

 that is to be sent out, may be safely put into that end 

 within the ship, which being again close shut, and the 



