Show Practical Chemistry Young gentlemen said the lecturer lecturer lecturer lec lec- In chemistry coal exposed to the elements clements loses 10 per cent of Its weight and power This is due to the action of the alkali constituents of of- of But Dut what if there is a dog sleeping sleepIng sleep sleep- Ing near the coal professor None of your levity young man This is a serious matter what dad thought when 72 per cent of our coal pile disappeared during three nights of exposure Then he be risked asked my advice ud as os a 0 student In chemistry and I told him to buy a dog He lIe bought a fl dog with large large- sized teeth and now we dont don't lose 1 per cent of our coal a month That's practical chemIstry |