CHAPTER XIII.

_DELIMING, BATING, PUERING AND DRENCHING._

Methods of removing lime and reducing swelling -- Use of acids -- Lactic, acetic and formic acids -- Boral -- Sodium bisulphate -- Boric (boracic) acid -- Borax -- “Pulling down” process -- Use of ammonium chloride and sulphate -- Pickling solutions -- Drenching with lactic acid -- Metabisulphite of soda -- Washing out lime, French process -- Nesbitt’s process -- Use of carbonic acid -- Carbolic acid -- Cresotinic acid -- Oxynaphthoic acid -- “Anticalcium” -- “Acrilene bating acid” -- “C.T. Bate” -- Use of sulphides and polysulphides -- Babool pods -- Bran-drenching -- Bating and puering -- Causes of bating effect -- Pepsin -- Trypsin, or Pancreatin -- Wood’s researches -- Erodin -- Palmer’s experiments -- Other artificial bates -- Relative effect of dog- and pigeon-dung bates -- Analysis of dungs -- “Scudding,” or “fine hairing” -- Preservation and use of dung PAGE 152