The lack of scientific training would hamper his later explorations of nature. He tried to make up for it at the university in 1740, but his mathematics instructor, Privatdozent Christian Ammon (1696–1742) was ignorant of the calculus (Kuehn 2001b: 13–16)—an essential tool for understanding the cutting-edge physical research of the day. Kant’s quantitative skills were to remain substandard; when he calculated, the results usually came out all wrong (Adickes 1924a: 73–83; 1924b: 1:38–9). This lack in mathematical training played into his belated comprehension of Newton’s work, yet did not harm Kant’s appreciation for him. Such a substandard education in arithmetic, philosophy and the sciences were the norm at the Collegium Fridericianum, and Kant would have to continually work to make up for this early deficit.