Though legislative sessions rarely lasted more than ten weeks, Roosevelt treated his new position as a full-time career. Taking his seat on January 1, 1911, Roosevelt immediately became the leader of a group of "Insurgents" who opposed the bossism of the Tammany Hall machine that dominated the state Democratic Party.
On June 16, 1911, the four companies of, Julius E. Pitrap (patented the computing scale), Alexander Dey (inventing the dial record), Herman Hollerith (patented the Electric Tabulating Machine), and Willard Bundy (invented a time clock to record a worker's arrival and departure time on paper tape), amalgamated in New York State by Charles Ranlett Flint forming a fifth company, the Computing-Tabulating-Recording Company (CTR) based in Endicott, New York.
On December 3, 1911, Carrier presented what is perhaps the most significant document ever prepared on air conditioning – Rational Psychrometric Formulae – at the annual meeting of the American Society of Mechanical Engineers. It became known as the "Magna Carta of Psychrometrics".