As sealcoating contractors begin their season many of them, particularly those accustomed to using refined coal tar sealer, wonder what the season will hold for their favorite product. Already ...

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THE numerous products obtained from coal-tar are ever increasing in importance, not so much, perhaps, because of the isolation of new substances or new derivatives of the older materials ...

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A 40-year-old Hispanic man presented for treatment of dermatitis on his elbows and knees that had been evident for 5 years (Figure 1). He also had scaling plaques on his scalp. He had not been ...