May, 1912.J 



the Botanic Garden. It was quite shut 

 off from the Governor's park, to which it 

 had been annexed. Besides this, Teys- 

 mann opened five annexes to it in the 

 mountains at different altitudes (1,050 to 

 3,020 meters), so as to cultivate under 

 normal conditions the plants of the 

 coldest regions. In 1880 the Director, 

 Prof. Treub, greatly stimulated the 

 development of the scientific section of 

 the work ; he opened laboratories, and 

 placed them at the service of foreign 

 men' of science. In short, he trans- 

 formed this Botanic Garden into an 

 International Tropical Station for the 

 study of botany, and it has remained 

 unrivalled as such. At present, efforts 

 are being made to promote the agricul- 

 tural activity of the scientific staff, in 

 view of the preponderating importance 

 of agriculture in the economy of the 

 Dutch East Indies. The Botanic Garden 

 occupies an area of 54 hectares (133 acres) 

 which are entirely irrigated. 



Over 9,000 kinds of plants are grown 

 at Buitenzorg. They are generally 

 classified by families according to the 

 flora of Bentham and Hooker. 



The following scientific institutions 

 are connected with the Garden :— 



t. Botanical library with reading 

 room, containing 25,000 volumes. 



2. Botanical Museum and Herbarium. 

 This latter contains over 100,000 speci- 

 mens, preserved in zinc receptacles, 



Plant Sanitation. 



3. Laboratory for agricultural che- 

 mistry. 



4. Pharmacological laboratory. 



5. Agricultural and geological labora- 

 tory. 



6. Laboratory for the study of agri- 

 cultural plants. 



7. Laboratory for the study of Deli 

 tobacco. 



8. Laboratory for the study of coffee. 



9. Laboratory for ferments and fibre 

 plants. 



10. Laboratory for strangers, 



11. Botanical forestry museum. 



12. Laboratory for the study of tea. 



13. Zoological laboratory. 



14. Printing office with stereotype 

 plant. 



15. Laboratory of phytopathology. 



The experimental station at Pjikeu- 

 menth must be added to this long list. 

 It is of special importance for agricul- 

 ture, and is about half an hour from 

 Buitenzorg ; the several varieties of 

 colonial crops are grown there on large 

 plots of land on a practical system. 

 This station is deserving of special 

 study, as is also the School of Agricul- 

 ture annexed to it since 1903, which 

 receives both European and native 

 students. 



421 



PLANT SANITATION. 



CLEAN CULTURAL PRACTICE 

 METHOD FOR FIGHTING INSECT 

 PESTS. 



By Edward M. Errhorn. 



(From the Hawaiian Forester and Agri- 

 culturist, Vol. IX-, No. 1, January, 1912.) 



In the course of the ages through 

 which our world has existed there has 

 been gradually established, by the in- 

 fluence of surroundings, a certain ratio 

 between animals and plants. There is 

 a continuous struggle going on among 



the plants themselves as well as a 

 struggle between the plants and insects. 

 This has been more generally observed 

 where nature's influence has been upset, 

 making surroundings as it were unna- 

 tural. Extensive plantings of one plan 

 or other has created abundance of food 

 which very soon is eagerly sought by 

 various enemies, either fungi or insects, 

 and nature is unable under such condi- 

 tions to hold her balance. 



From the time that man began to 

 cultivate, his crops have been attacked 

 by some pests, be it vegetable (fungi) 



