At the beginning of the 20th century people all over the world spoke about the new scientific discoveries and especially about A. Einstein's theory of relativity. The theory of relativity was included into the program of the lessons of physics and the teachers of the RPI explained it to their students. The alumni Tuvia Schalit wrote a book in Hebrew about the theory of relativity of A. Einstein. Unfortunately his book can not be found for the moment neither in Latvia nor in Israel.