Shares of Mine Safety Appliances lost 19.12% to $32.64 as the company missed Wall Streets second-quarter earnings expectations. Net income increased to $20 million, 55 cents a share, from $17.3 million and revenue rose to $293.2 million, or an 18% gain. Analysts expected earnings of 60 cents per share on revenue of 276.1 million. MSA is a Pittsburgh, Pa.- based company that is engaged in the development, manufacture and supply of products that protect people's health and safety. http://biz.yahoo.com/ts/080728/10430647.html?.v=1