They were using a bi-metallic leaf spring as a thermometer; it worked because iron and copper expand at different rates when they are heated. They were using a Celsius temperature scale, so they had the low temperatures pretty accurately calibrated, but the higher temperatures were merely scaled from the lower known values. At least, the distillate fractions came off at pretty distinct intervals of temperature, so they had a workable system.Charles only had to make minor adjustments in his engines to make "Fraction D" work quite well as a substitute fuel for the animal fat. In fact, if anything, the engines ran with a little better fuel efficiency. With a little experimenting, Charles found that he could mix in the animal fat up to 25% into Fraction D without having to make any adjustments in the current fuel feed system.They had to have more metal! There was enough copper and tin available if they could just mount the effort to get it. But they were back to the problem of not enough. My bosses wife had come along with him and judging by the look on his face he wasn't too happy about it. Anyway she was pretty drunk by this point and we still had the meal to go for, Lynn must in her late fifties but still has a pretty good body. We left the pub heading for the chinese and she sat beside me for the meal.Ive always got on with her pretty well over the years and have a laugh with her when she phones the office for her husband and tonight was no different but she is very flirty with a drink in her. As the night wore on she was pretty drunk and my boss was really annoyed with her as he is very old school with things like that and he had told her on several occassions that she was making a show of herself and to go home.By the time the meal was finished and we had moved on to the next pub she was drinking shots with us and that was it my boss called her a taxi and the two of them disappeared outside.Ten minutes or so late my boss came in and asked if he could have a.
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