Place rack back in roasting pan and bake in oven for 10 minutes, reduce temperature to 250Â° and bake for 60-90 minutes (time will vary depending on whether you have a short fat roast or a thin long roast). My roast took 90 minutes to reach 145Â° internal temperature.
Noun[edit] hornbook â(plural hornbooks) A single page containing the alphabet, covered with a sheet of transparent horn, formerly used for teaching children to read.
For the engine intake component, see Velocity stack. An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, and the horn amplifies the sound so it is louder.