For strong liquid glues. (1)' heat together on a water bath for six hours clear gelatine, 100 parts; best Scotch glue, 100 parts; alcohol, 2o parts; alum, 2 parts; and 200 parts of 20 per cent, acetic acid. (2) Boil together for several hours 25 parts glue, 65 parts water, and 1 parts nitric acid. (3) Dissolve ti parts of glue or gelatine in 4 parts of saccharated solution of lime; neutralise the lime with a third part of oxalic acid, and add carbolic acid as a preservative.