The screws were supposed to be galvanized, but they rusted anyway.
The increase in the demand for zinc is attributed to an increase in the demand for galvanized steel.
...the dog-food gave out, and a toothless old squaw offered to trade them a few pounds of frozen horse-hide for the Colt’s revolver that kept the big hunting-knife company at Hal’s hip. A poor substitute for food was this hide, just as it had been stripped from the starved horses of the cattlemen six months back. In its frozen state it was more like strips of galvanized iron, and when a dog wrestled it into his stomach it thawed into thin and innutritious leathery strings and into a mass of short hair, irritating and indigestible.