Scholarly, peer-reviewed journals can be incredibly dense reading for undergraduates. These selected periodicals do a good job of presenting physics in a form that is more appropriate for students in lower-level physics courses.
from 1845 to 12/26/1908 in American Periodicals Series
from 1910 to 1947 in Scientific American Archive Online
from 1968 to present in OWU Science Periodicals
from 01/01/2005 to present in Academic Search Complete
from 1853 to 1909, 1948 to 1967 in OWU Beeghly Periodicals