JF Ptak Science Books Quick Post
One thing is for certain with this dream of an amphibious car (Popular Mechanics, July 1942)--it certainly has a lot of curtains. I looked around a bit for the patent on this vehicle in the obvious places/keywords for patents 1935-1942 but couldn't find it. I did however bump into some other interesting amphibious craft, two of which I've reproduced below for their spherical natures and lack of curtains.
A spherical amphibious craft with no curtains:
[Source: Google Patents https://www.google.com/patents/US2308838dq=amphibious+vehicle&hl=en&sa=X&ved=0ahUKEwiw8rv0wJPNAhUDNSYKHZvNBbk4FBDrAQgqMAI ]
And another spherical non-curtained amphibious object:
[Source: Google Patents, https://www.google.com/patents/US2330958?dq=amphibious+vehicle&hl=en&sa=X&ved=0ahUKEwjb5umc3pPNAhVGYiYKHXipAHIQ6AEIKjAC ]