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When the glue has to items to be acids, such as cuvettes, ordinary glue or cement does no good because it is corroded by acids like. The best for this purpose proved to be the glue, which is a mess of rubber, coal tar and asphalt, thick uncool in a mixture of equal elements of ether, alcohol and chloroform. The composition of this very firmly glued elements has also great resists acids. The same composition in a liquid state can serve a good, not Mark also very durable nail polish timber and etc.