Heat-ray weapons of WW2

I've reproduced a few pages of an old pamphlet from the Ministry of Information on heat-ray weapons of WW2. We take these for granted nowadays, but it covers some of the background of how they were first used, the teething problems with the original Martian models, their use in war and how the scientists at the TRE developed materials to make them en masse. I'll add more pages as I scan them.