Plane Plants, Airfields Struck By 1,200 Heavies.

Rumbling through ineffective enemy air opposition, more than 1,200 heavy bombers of the 8th Air Force swung deep into eastern and southern Germany yesterday to cut NAZI air strength at its source. Liberators struck at plane plants and airfields in the south and Fortresses thundered eastward to hit at industrial objectives in the Chemnitz and Leipzig areas.  Some of the 600 escorting Mustangs clashed with enemy fighters over northwest Germany and came up with their biggest bag in some time, as 39 NAZIS, including five jet-propelled planes, were tumbled from the skies. Early reports last night gave one fighter group, the 78th, the fattest kill of the day -- 32, to of them Arado 234 jet-propelled fighter-bombers.  The Libs, bombing from clear skies, emptied their bomb bays over a factory making jet plane parts at Baumenheim, 20 miles northwest of Augsburg, and over airfields near Ingolstadt and Ulm, both in the general area of Augsburg. The latter field is believed to be assembling jet planes. Forts which attacked industrial targets at Plauen, west of Chemnitz, and war plants at Jena, southwest of Leipzig, had to bomb through clouds.  Before the 8th swung its 1,800-plane punch yesterday, Lancasters of the RAF, carrying 11-ton and six-ton bombs, were out in the morning to attack railway viaducts at Arnsburg, southwest of Hamm, and at Bielefeld, where the RAF christened its new 11-tonner last week.  USSTAF revealed yesterday that 25 bombers and five fighters are missing from Sunday's operation over Berlin. At the same time it announced that photographs taken during the attack showed excellently placed bombs carpeting the centrally located Schlesicher and North Stations rail yards and fires burning the Templehof airdrome and marshalling yards. Libs which struck at industrial objectives in the suburban areas also achieved good results, the photos showed.