The following films are produced by Educational Services, Inc., and are
available from Modern Learning Aids, A Division of Modern Talking
Picture Service, Inc., 3 East 54th St., New York 22, New York.
_Energy and Work_, 0311, 29 minutes, $150.
_Mechanical Energy and Thermal Energy_, 0312, 27 minutes, $120.
_Conservation of Energy_, 0313, 27 minutes, $150.
_Photo-Electric Effect_, 0417, 28 minutes, $220.