Sound waves are very convenient for the investigation of
all wave phenomena with the exception of polarization. They are
particularly useful in connection with microwaves because the
latter's wave length can be easily duplicated with sound waves,
making it possible to obtain the same diffraction pattern for
both when confronted...
Of the 100 specimens of Leptocottus armatus armatus Girard examined at the Oregon Institute of Marine Biology at Charleston, Oregon during June, July, and August, 1950, 99% were infected with helminth parasites. There was an 83% infection with Echinorhynchus gadi and a total of 1,258 individuals. There was a 16%...