Thank you all. You’re very kind.
Mike, you are correct, both shots are hand-held but for the second I leaned the camera against the doorframe. Yes, I managed to buy myself a brand new tripod but never considered taking it in the museum (In Dec 2005 I had my 10th year anniversary with the company where I work so they showed some gratitude in the form of a bonus. Same day at lunchtime I went to the photo store looking for my tripod. Good things still happen…).
Stupid me, I also forgot to mention the camera used; well since my Spotmatic got ill (mirror not returning for the long exposure time) I took my Fujica ST605. Here is a picture of the camera with her original lens.

Nancy, this was my first time at the Science Center and I was not sure what to expect. This is when I always carry a camera with me. “The beginning” is a shot of the electrostatic sphere, where you put your hand on the glass and the sphere extends miniature lightning connecting the center with various random points on the glass.
Fascinating toy to look at. I spent some time there bracketing from 1/15 up to 1 sec.
Best shot was at 1 sec/ F1.4 holding my breath. I’m glad you liked it.