battle of thermopylae

'10 February. The Peregrine flew north across the valley. He was half miles away, but I could see the brown and black of his wings, the shining gold of his back. The pale cream of his tail coverts looked like a band of straw twisted across the base of his tail. Thinking he'd return downwind, I went into fields with the river to watch for him. I stood in the lee of the hawthorn hedge, looking through it on the north, sheltered in the bitter wind' Diesel particulate filter, filters the particulate matter by forcing the exhaust gases to pass through a ceramic wall flow filter. The ceramic wall flow filter features a porous wall and is single ended. When the spent gases are forcibly passed through the porous wall, the particulate matter is filtered along with the gas is discrete thereby lowering the particulate emission inside atmosphere.