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for convenience but two series of numbers are used — one the "Herbarium 

 Koordersianum" and one the "Herbarium variorum," the former now 

 numbering from 1 to nearly 40000, the latter from 1 to about 500. Each 

 collection has a distinctive label. The method of building up the col- 

 lection is as follows: 



The "Herbarium Koordersianum." — Either Dr. Koorders himself col- 

 lects the specimens or some native collector is sent out with the usual 

 botanical equipment, and also a series of consecutively numbered field la- 

 bels, always numbering from 1 to 500, 1000, or 2000, according to the 

 length of time the collector is to be out. By providing these consecutively 

 numbered labels, all chance of duplicating numbers in the field is avoided. 

 The first specimen collected receives label No. 1, the second No. 2, etc. 

 When the collection is brought in it receives in addition to the "'field 

 number," a museum number of the "Herbarium Koordersianum." The 

 collector's number is preserved in the records, and on the herbarium spec- 

 imen, but the museum or "Herbarium Koordersianum" number is the 

 only number used in the distribution of duplicates to other botanical in- 

 stitutions, and all reference to the specimens are made by the use of this 

 latter number, which is entered in a register, with references to the col- 

 lector and his field number. For example, at a certain date the "Herba- 

 rium Koordersianum" register numbers 15500, and at this date a col- 

 lection of 1,100 specimens is brought in by some field collector ; No. 1 of 

 this collection receives the new number, 15501, and so on until the new 

 collection has been incorporated in the "Herbarium Koordersianum" 

 series. 



The "Herbarium variorum." — This is of course combined with the gen- 

 eral forest flora herbarium, and is similarly numbered, but with a dif- 

 ferent series. For instance, some Army officer sends in 50 plants ; these 

 are numbered "Herbarium variorum" from 1 to 50. Later some civil 

 official may send in 100 specimens; these are numbered from 51 to 150, 

 with, of course, the collector's name and date preserved. By this method 

 a very careful record can be kept of all accessions. 



The original field labels are pinned to the herbarium sheet, and all 

 references, labels, and tags on the sheet receive the register number, either 

 of the "Herbarium Koordersianum" or "variorum," as the case may be. 

 These labels are not attached permanently because often it is of import- 

 ance that they be removed when one is working up some genus or species, 

 in order that he may have all the references to the genus or species in 

 question before him at one time. By reference to the register and the 

 herbarium number, the labels can readily be reattached to their proper 

 sheets. The permanent labels are always pasted to the sheet on the lower 

 right-hand corner, as in American herbaria. 



In the general herbarium the specimens are mounted on paper of rather 

 poor quality but of the standard size — 11^ by 16^ inches. The speci- 



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