Is this a vintage frequency generator?

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I have posted a picture of a machine

(http://health.ph.groups.yahoo.com/group/Rife/photos/view/ab92?b=1 ) that is

from the estate of an 85 y.o. M.D. who is an avid collector of many things

including medical. As you can see it is made by McIntosh Electrical of

Chicago and is called the Hydrosine. It says it's an " Intensity Regulator "

that goes from 15-180. I played with this as a kid. There are two metal bars

you hold in your hands and turn of the frequency to see how high you can

" take it " (as a kid this was the way we played with it and I'm in my 50's

now).

Now as an adult learning and using Rife type machines, I can't help but

wonder if this was some early frequency type machine. I can't find out

anything about it and wonder if anyone recognizes it? Any thoughts or ideas

would be appreciated.

Sally