By bringing either of the indicator arms to any given point, the latitude and longitude of the said point may at once be determined without future computa- 8:, tion. I read this as Gleason unwittingly fessing up that his map is, like any other, a projection of a globe or section thereof onto a flat surface. At first look Gleason’s map is visually striking but otherwise innocuous: a north-polar azimuthal equidistant projection, enlivened by a bright-red horizon ring, with two rotating “indicator arms” to be used for determining the times at different locations.

My frames are glazed with super-clear museum-grade acrylic (perspex/acrylite), which is significantly less reflective than glass, safer, and will always arrive in perfect condition. On these indicating arms are numerals, J, indicating degrees of latitude corresponding to the degrees of latitude as represented and marked on the map at B at thirty degrees west of Greenwich. On the contrary, he said that he made the map from a globe, which explains how a north-pole centered azimuthal equidistant map is designed.

This means that I can tailor your map so that it perfectly fits a space on your wall, or a frame that you already own.

A piece of cloth, usually rectangular and attached to a pole at one edge, that has a pattern that shows it represents a country or a group, or has a particular meaning. Durable 220 micron Poly-Paper is hygenic, waterproof, tear proof, suitable for indoor/outdoor - a superior alternative to lamination. On page 350, he mentions “a new map of the world as it is” and says, “it contains all the continents and principal islands and rivers of the world, also, all the principal cities of the earth.Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. US497917A - Alexander gleason - Google Patents US497917A - Alexander gleason - Google Patents Alexander gleason Download PDF Info Publication number US497917A US497917A US497917DA US497917A US 497917 A US497917 A US 497917A US 497917D A US497917D A US 497917DA US 497917 A US497917 A US 497917A Authority US United States Prior art keywords map time gleason arms arm Prior art date 1893-05-23 Legal status (The legal status is an assumption and is not a legal conclusion. m. for London, and there is no computation or counting for the child to make; he thus reads the hour and fractional part thereof from the dial of the map. On the arms is stamped the degrees of latitude; by the operation or moving of these arms the relative time of day or night is quickly determined and read on the dial by the child or person who can read the multiplication table, or tell the time of day by the hands of a clock.