Thank you for the comments, Joe.

Wolfgang, my apologies. I swear I searched the data base
and the threads before posting (also used various spellings)
Don't know what went wrong.

Margarita, my understanding of "dynamite" is that it was
the original explosive made by Nobel.
However, it was unstable and dangerous. Some type of clay
was mixed with it to stabilise it, and it was marketed as
"gelignite". It now tends only to be dangerous if it gets
old, because it then "weeps" nitroglycerine.
This is all from a non-expert, by the way.

Regards,
Shimbo