... The normal m 1 , c 1 indices and metallicities have been calculated for 2472 F-stars from the uvby and H fotometry. ... It is shown that the metallicity distribution of F6-G0 dwarfs is not a Gaussian one, but may be considered as a sum of two normal distributions. At the centre, the distribution shows a gap which subdivides all the stars into two metallicity groups. ... По данным uvby , H - фотометрии вычислены нормальные индексы m 1 , c 1 и определена металличность 2472 F-зыезд. ...