HERCULES, Calif. (AP) _ Bio-Rad Laboratories Inc. (BIO.B) on Tuesday reported second-quarter earnings of $268 million.

On a per-share basis, the Hercules, California-based company said it had net income of $8.87. Earnings, adjusted for one-time gains and costs, came to $1.64 per share.

The maker of instruments used in biomedical research posted revenue of $575.9 million in the period.

Bio-Rad shares have risen 31 percent since the beginning of the year. In the final minutes of trading on Tuesday, shares hit $312.90, a climb of 48 percent in the last 12 months.

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