Jos Janssen sent a great reply to my post on Messiaen.  Thanks, Jos.

Jos, I wonder if you would help me again.  When I first started reading
about the Turanglila, I saw the name 'Ondes Martenot.' Searching the net,
I found out that it is an electronic instrument.  However, reading the
description, I couldn't picture it.  It would be great if you would
describe it for me.  Also, and please correct me if I am wrong:  Wasn't the
Turangalila composed in the 1920's? If it was, wouldn't that make the Ondes
Martenot one of the first electronic instruments used in composition?

Thanks.

Ron Chaplin