European War Developments at a Glance 7 Sept. By Associated Press BERLIN Germans say motorized troops speeding through Poland ahead of schedule; predict Lublin, temporary seat of Polish government, will be under artillery fire Thursday; Krakaw, heart of Poland falls; Germans surprised at lack of stiff resistance in southwest; quiet reported on western front; Bremen said to have reached undisclosed neutral port; Berlin air raids denied. PARIS French announce continued advance beyond frontier into Germany; land, air forces coordinated against Siegfried line in Saar basin; successful British French air raids reported on industrial triangle formed by Aachen, Eschweller and Stolberg; two air raid alarms send Parisians to shelter. LONDON Britain establishes new ministry of economic warfare to direct blockade against Germany; regular army, territorial units and militia unified to facilitate operations; first German air raid on British coast reported repulsed; Churchill says 125 Athenia passengers still unaccounted for; German freighter Inn reported sunk in mid Atlantic. WARSAW Defenders of Warsaw wage desperate stand against nazis; feared invaders might reach capital in few hours; citizens called to dig trenches around city; Germans only 35 miles away; army says holding back overwhelming enemy forces n southwest; air raids continue; fleeing residents clog highways. WASHINGTON Two destroyers and two coast guard cutters patrol North Atlantic to report on presence of any belligerent warships; additional 116 destroyers later to join patrol extending east of New England to Antilles and Panama canal; Murphy urges citizens to report spying activity to F. B. I.; Union of South Africa minister advises Hull his country at war with Germany. RIGA Small Polish garrison still holding out in Westerplatte, Polish munitions depot in Danzig harbor; German naval and air bombardment continues.