TORONTO (Aug. 10)—AirBoss of America Corp.'s sales jumped 49 percent to $30.8 million in the quarter ended June 30 from $20.7 million in the like period last year. However, net income fell 12 percent to $899,108 from about $1 million. Sales in the first six months rose to $55.3 million from $42.9 million while earnings fell to $1.1 million from $2 million in the first half of 2000. The manufacturer of rubber and plastic products said it is concerned about the effects of the economic slowdown on the rubber and transportation industries but it's encouraged that it continues to increase sales and market share. AirBoss noted that its Railway Products division was responsible for a major portion of the sales increase.