First Grand Slam

City of Rensselaer, NY

On September 10, 1881, in the young days of the National League, Troy's own Roger Connor came to bat with the bases loaded and drove in four runs at once — the first grand slam in Major League history — lifting the Troy club past the Worcester Ruby Legs 8–7. Connor was a towering slugger for his era, and his power at the plate made him one of the game's early stars during the rough-and-tumble Gilded Age when professional baseball was still finding its footing. He would go on to a career so distinguished that the Hall of Fame enshrined him in 1976, long after his playing days. This marker fixes the spot where one of baseball's enduring milestones was set.

City of Albany, NY

In 1868, Albany inventor John Wesley Hyatt was chasing a $10,000 prize offered for a substitute for increasingly scarce ivory billiard balls. His answer was celluloid — a moldable material made from nitrocellulose and camphor that is widely regarded as the first commercially successful synthetic plastic. Produced here by the Albany Billiard Ball Company, it turned a parlor-game shortage into the opening chapter of the modern plastics age.

Town of Milton, NY

In the paper-making valleys of upstate New York, water power turned wood and fiber into industry, and George West built one of the mills that made Saratoga County a papermaking center. Known as the "Paper Bag King" for perfecting machinery that mass-produced the folded paper bag, West ran this water-powered mill making manila paper from hemp. Fire leveled it in 1869, but it was rebuilt the following year and ground on until 1899, at the close of the century that had turned American milling from craft into industry.

Town of Woodbury, NY

On a September day in 1851, superintendent Charles Minot was aboard a stalled New York & Erie train when he did something no railroader had done before: rather than wait blindly for an overdue oncoming train, he walked to the station telegraph and wired ahead to hold it, then ordered his own train forward on the strength of the reply. Until that moment trains ran by fixed timetable and nervous guesswork, and a single misjudgment meant a head-on collision. Minot's telegraphed order turned the humble station on the Erie line into the birthplace of the 'train order' system that would soon govern rail traffic across the continent.