uvby photometry of the chemically peculiar stars HD 15980, HR 1094, 33 Gem, and HD 115708

Differential Stromgren uvby photometry obtained with the Four College Autom ated Photoelectric Telescope shows that the hot HgMn star 33 Gem is photome trically constant. The Si star HD 15980 is found to be a variable whose per iod is significantly greater than 2 years. The unusual magnetic chemically peculiar Co star HR 1094 is discovered to be a low amplitude photometric va riable with the magnetic field period of Hill & Blake, 2.9761 days. The eph emeris for the magnetic chemically peculiar star HD 115708 of Wade et al. i s confirmed with the error in its period of 5.07622 days being greatly redu ced. The u, v, b, and y light curves for both HR 1094 and HD 115708 exhibit differences which indicate complex elemental photospheric abundance distri butions.