I'm guessing very few of you will have even heard of the vintage sal ammoniac haze pots. They weren't all heater cones with exposed elements - there were "safe" fully enclosed ones too. One fog effect I missed from the list was the oil burning foggers. That was deliberate. They tend to be used on outdoor film sets, but are not suitable for indoor use. With reference to glycol hazing of hospitals, you can still get a "glycolized air sanitizer" called Ozium which lists its ingredients as 4.4% triethylene glycol, 4.4% propylene glycol, 3.5% essential oils, 44.3% isopropyl alcohol and 43.4% inert ingredients - possibly the propellant? My brother uses it in morgues. It ain't cheap. I properly hazed my house with the ammonium chloride. It didn't actually take much to do it. But the haze is literally tiny crystals of the chemical and does cause the sort of eye and nose effects you'd get from breathing dust. I doubt it would be allowed these days, but it does produce a surprisingly good effect that used to be common in night clubs before the glycol fog machines became popular. Oil hazers are considered a specialist piece of equipment and are only suited to some venues. They produce a very fine haze of oil in the air, and as such might not be considered the healthiest haze generating device. Especially for continuous exposure in a themed environment. Glycol fog machines and hazers tend to use fluids based on combinations of glycols or glycerin and water. The higher the concentration of glycol the denser the fog up to a point. Typically fog fluid is in the region of 30% glycol in distilled water. (Pure water reduces the risk of precipitate build up that can clog the heater tube.) Glycol haze and fog goes back many decades with the only known hazards being irritation of the mucous membranes caused by the very hygroscopic (moisture absorbing)nature of the fog when overused. An oft-quoted bit of research from the past involved groups of rats and monkeys living in closed environments that were hazed with glycol continuously for over a year. The only point they experienced issues was when the glycol saturation was so high that it caused skin drying problems. Subsequent analysis showed no lung or other organ anomalies. One other fog effect used in some attractions at Disney theme parks is the liquid nitrogen fogger. It sprays liquid nitrogen into a spray of hot water or steam to create instant thick fog with short duration and no residue. It's only suited to specific attractions though as the initial cost and ongoing supply of liquid nitrogen to dedicated thermally insulated towers is huge. They also require integrated air monitors to avoid excessive oxygen displacement. The nearest similar effect found in the event industry is simple carbon ... https://www.youtube.com/watch?v=bySTH6H_REs

A look inside a chunky head torch that was sent for autopsy by Jamie. When he got it and put the batteries in a contact glowed red hot inside. This video also has more camera setting experiments. I'm using open-camera on a Moto G with focus and exposure in auto, colour temperature locked and HDR (High Dynamic Range) enabled. The simple addition of autofocus to the mix means that the image quality is going to be a lot higher at the expense of slightly blurred moments. If you enjoy this channel you can help support it with a dollar for coffee, cookies and intriguingly faulty electronic equipment at:- http://www.bigclive.com/coffee.htm ... https://www.youtube.com/watch?v=FDC3smuXUaA