BTH Lighting Bulletin No.9 , CIRCUITS FOR DISCHARGE LAMPS , July 1949

... it's the content that counts ...
So, this little booklet from 1949 is no longer in the best condition visually. But the contents provide some interesting information on the technology of discharge lamps from the 1940s and their circuits. So allow me to upload this pdf here.
My thanks go to Andy, he was very helpful to me in obtaining this booklet.