 This is something we forget because all our tires are now black. But by adding Lamp Black to the automobile tire rubber, they made the tires much more durable. And of course, this was an excellent part of their business. It made them a lot of money. And they made an even better kind of tire. And eventually they would patent the formula that meant they would add the Lamp Black already to the liquid rubber. And so their tires were even better.