Tire placard pressure is often much lower than listed on the tire sidewall. Air pressure given by the vehicle maker was based on the tires supplied with the vehicle. They design many newer replacement tires to give a good ride, with much more pressure.
Fresnel lens. A Fresnel lens is a type of lens invented by Augustin-Jean Fresnel. Originally developed for lighthouses, the design enables the construction of lenses of large size and short focal length without the weight and volume of material which would be required in a lens of conventional design. Detailed information.
It is not clear who invented the first, but several companies made color cameras. The earliest seems to be the 1899 Ives Kromskop Triple Camera by F.E. Ives of Philadelphia, wâ¦ho also made a direct color viewer for the plates. Another early 20th century example was the German Jos-Pe in 1925.