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a comparatively easy matter to dry, poison,^ and mount 

 specimens. Such a collection (herbarium) will be of value 

 to the school in many different ways. From the collection 

 of this material by barrio or other teachers the supervising 

 teacher should make his collection for the district. In turn, 

 the industrial supervisor should make a collection of the 

 industrial plants of the province to be kept on file in the 

 office of the division superintendent. 



It is hoped that by a study of this bulletin teachers will 

 be able to classify and arrange many of the industrial plants 

 systematically. If any difficulty is encountered in naming 

 plants, the specimens should be sent to the General Office, 

 along with accurate and detailed information concerning 

 the structure, habitat, preparation, and uses of the plant. 

 Duplicates should be kept and both these and the original 

 should be numbered so that a reply can be sent without 

 sending back the plant specimen. It would also be a good 

 plan to work out maps for the various districts showing 

 where materials are found and in what quantities they are 

 obtainable. 



' It is necessary to poison plants in the Philippines to keep them 

 from being destroyed by insects. Such poison is prepared by dissolving 

 2 tablets of bichloride of mercury in about 1 liter of denatured 

 alcohol (sufficient bichloride should be used to make a saturated 

 solution). The specimens are then dipped in this solution and dried. 

 Do not put the hands in the solution, but handle the specimens with a 

 pair of tongs made of bamboo or some other material. 



