A. N. Wings made in 1911 . "Conversations on how to determine the orbits of comets and planets from a small number of observations" . In them he - and this is characteristic of his works on the history of knowledge - not so much talks with his listeners, but as if forces them to be present at his own conversation with the luminaries of science. In this simple form, but extremely wise and meaningful conversation, the classics are as if shared with A. N. By the winged and his hearers and readers thoughts which eluded many generations who studied their creations. He himself, full of gratitude and respect for famous men, at the same time with the directness and honesty of the Russian sailor pronounces his unpleasant court, acting as an arbiter in their noble scientific competition.