With regard to leather, this material is, under present conditions, a 'by-product.'

Nor is there any satisfactory application of this by-product as yet evolved.

As silver is now obtained largely as a by-product, there is almost no waste.

It is not a by-product, but an essential part of the animal's equipment.

It is prepared commercially as a by-product in the steel-plate mills.

You might say that in England fabrics were a by-product of agriculture.

It was the end of Mr. Frawley; he, too, had not only become a by-product but a good-by product.

She is too young to endure it, sobbed the by-product to her of the sketchy face.

In some instances the coke, and not the gas, is a by-product.

America finally did away with slavery (as a by-product of the Civil War).