ing very high temperatures without crack- the “Salus” street cleaner, is mounted upon two pairs tubes have proved of great importance in my work of large wheels and a pair of small wheels in the front ing. It is well Known that glass vessels must be an- on hydrogen gas submitted to very high… … to the broom. heated to a_ red Owing to the heat or even high- curved form of the broom the mud is driven in toward under the powerful electrical discharges, but the er in a muffle furnace. They are then thrown into the middle, collecting there upon a platform, which quartz tubes withstood this…
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