Exudation Exudate affects lower Exudate less granular (Hepatization) in or anterior border of than in pneumonia; lung, lower, lung; often in small forms in or posterior, anterior, isolated areas or gravitates to lower or central, usually around bronchia; less part of lung. undivided area blood engorgement Congestion passive than in fibrinous pneumonia If pleurisy effusion Pleural effusion Pleural effusion may be copious infrequent, or frequent and abundant limited, though pleurisy is common Abscess not infrequent Abscess rare Abscess not infrequent Pulmonary gangrene Pulmonary gangrene and Infarctions, sequestra, infrequent sequestra frequent and cavities not uncommon Pericarditis infrequent Pericarditis frequent Pericarditis frequent Blood, decrease of red Less altered than in Blood at first clots globules; encrease of either of the other firmly, later white, hæmatoblasts, forms. Shows becomes, thick, fibrine formers and cocco-bacilli in the black, sizy, soda salts earlier stages: hæmatosis tardy. streptococci later Reaction acid. Coagulation firm, buffy Coagulum loose, buffy coat coat slight Hepatic congestion, not Hepatic congestion Hepatic congestion hepatitis excessive, hepatitis, excessive, necrotic changes hæmorrhagic; fatty degeneration