what materials were used to build this?
Macintosh cloth, cotton, rubber and naphtha.
Halkett boat
Halkett designed a waterproof cloak made from an early form of Macintosh cloth, cotton impregnated with India rubber by using naphtha as a solvent
who designed the halkett boat? UNANSWERABLE describe this vessel in one line. It was a boat light enough to be carried over arduous terrain, but robust enough to be used in extreme weather conditions.
wiki:18127538
Halkett boat [SEP] Boat-cloak
Halkett designed a waterproof cloak made from an early form of Macintosh cloth, cotton impregnated with India rubber by using naphtha as a solvent. The lining of the cloak contained an airtight and watertight inflatable ovoid, split into four separate airtight compartments in case of puncture, and a pocket containing a paddle blade and a small bellows. The wearer of the cloak would carry a walking stick, which would double as the shaft of the paddle, and a large umbrella to serve as a sail. The cloak weighed around in total, and took three to four minutes to inflate; once inflated, it could support the weight of six to eight people.