Mites Affecting Humans. âMiteâ is a term commonly used to refer to a group of insect-like organisms, some of which bite or cause irritation to humans. While some mites parasitize animals, including man, others are scavengers, some feed on plants, and many prey on insects and other arthropods.ites Affecting Humans. âMiteâ is a term commonly used to refer to a group of insect-like organisms, some of which bite or cause irritation to humans. While some mites parasitize animals, including man, others are scavengers, some feed on plants, and many prey on insects and other arthropods.
cog railway. n. A railway designed to operate on steep slopes and having a locomotive with a center cogwheel that engages with a cogged center rail to provide traction. Also called rack railway. cog railway. (ËkÉÉ¡ËweÉª) or.
A railway zig zag, also called a switchback, is a way of climbing hills in difficult country with a minimal need for tunnels and heavy earthworks. For a short distance (corresponding to the middle leg of the letter Z), the direction of travel is reversed, before the original direction is resumed. The Lithgow Zig Zag stub was extended at great cost in 1908, only to be completely deviated in 1910. 2  Reversing a train without running an engine around to the rear of the train is hazardous. 3  Top and tail or push pull operation with engines at the rear of the train helps.