List, conditions...for making a machine or Seaman's Cistern..., by Zachariah Williams Headed: 'Conditions proposed for making a Machine or Seamans Cistern to render salt water fresh and drinkable'. Including £150 to be raised by voluntary subscription enabling the machine to be completed by the inventors, whose expenses will be defrayed. With a note on maintining the security of machine while it is under construction and on conditions for obtaining a patent. nd