| Show CAMPHOR this sub stanca is the produce of the he lauri camphora or camphor laureal of japan and china the roots and wood of the fhe tree aree are chopped up and boiled with water in an iron vessel to which an harthern ear thern head containing straw is adapted and the camphor su blimes and condenses upon the straw jn in china the chopped branches are boiled baile d in j n water till the he camphor begins to adhere to the stirrer the liquor is then and the camphor concretes on standing it is afterwards mixed with a finely powdered earth and sublimed from one metallic vessel into another two kinds of unrefined or crude cam chor are known in commerce dutch or japan camphor and china camphor it is chiefly produced in the island of formosa and conveyed in junks to canton whence ilce lice the foreign M markets are supplied crude camphor very much resembles mom MOW sugar before itis it is cleaned it is refined and ans converted into the fhe beautiful well known article sold in the shops shop by sublimation the process pro cess is carried on in vessels called bombolo bombo loes they are made of thin olm gim nias glas and weigh about abou esi esl I 1 ib lb each and measure about 12 inches across each vessel has a short neck reck when field filed with crude cam camphor hor bor they are int im bedded in a sa sand nd bath and heat beat heated it to a temperature of from fron des dep to 2 0 deg which is afterwards raised to between 3 00 d e eg and ana d eg about 2 percent per cent of quicklime ji me an and 2 parts boneblack in fine pow powder der are added to the melted camphor and tile the heat neat raised so as to boil the L quid the vapor condenses in the upper part of the vessel As the sublimation proceeds the height of the sand around the vessel is diminished dimini shed ebed the process is completed in about 40 hours this operation requires re aires considerable sid erable attention and experience ex |
