The building of the Kazan branch of the USSR Academy of Sciences. Monument to N.I. Lobachevsky in front of the building. Doctor of Physical and Mathematical Sciences H. M. Mushtari, head of the optical laboratory and laboratory employee at work. The work of the chemical laboratory in the building of the Kazan branch of the USSR Academy of Sciences. Meeting of the Presidium of the Kazan Branch of the USSR Academy of Sciences. Speech by Academician A.E. Arbuzov.