Onderzoek naar bruikbare kenmerken ter identificatie van boomen naar hun bast
Thorenaar, A. - \ 1926
Wageningen University. Promotor(en): E. Reinders. - Wageningen : Veenman - 207
bosbouw - floëem - schors, bomen - nederlands indië - cum laude - forestry - phloem - bark - netherlands east indies
To facilitate further discussions and to inform tropical forestry experts, the formation and anatomy of bark were reviewed in association with its terminology. Sections deal with: secondary phloem; dilation and sclerosis; their influence on primary bark parts and on secondary phloem; interxylary phloem; pith ducts; periderm; lenticels and dead outer bark. Next follows an analysis of what could usually be seen of the anatomy of the bark and the crust with a x 10 lens and with the naked eye. The features noticed were then evaluated as distinctions for bark species. Information was given on odour and taste.
Then follow descriptions of 60 investigated barks of the Indonesian Archipelago, analysed by these means. A x 10 lens proved sufficient for identification.
The sequence of bark features from common to special features was shown to be usually: cork layer, stone cells, fibres, soft bark parts, secretory organs, bark rays, while the primary bark parts, often having disappeared, could only serve as distinguishing features for a limited number of barks.
If the number of bark parts considered were to be further enlarged the use of a x 20 lens might become necessary.
De micrografische identificatie van hout
Beversluis, J.R. - \ 1925
Wageningen University. Promotor(en): A. te Wechel. - S.l. : S.n. - 132
bosbouw - hout - schors, bomen - houteigenschappen - meting - experimenten - statistiek - simulatie - forestry - wood - bark - wood properties - measurement - experiments - statistics - simulation
The timber of dicotyledonous trees could not be classified on microscopic features in harmony with taxonomic practice because botanical systems were still faulty and not generally recognized, and because microscopic descriptions of timber were not uniform enough for compilation. To find whether timber features could be conformed with a botanic taxonomy, a scheme was drafted for the description of secondary wood of dicotyledonous trees based on definite, uniform and comparable characteristics.
On this basis short descriptions were compiled of the timber of 93 species and a table was composed of species identical in microscopic structure. The 24 most important characteristics of the 42 families represented were described. Families and species were indexed.
Het looistofvraagstuk in Nederlandsch-Indie
Wind, R. - \ 1924
Wageningen University. Promotor(en): A. te Wechel. - Leipzig : Metzger & Wittig - 301
looizuurleverende planten - bosbouw - schors, bomen - tanninen - leerverwerkende industrie - tanstuffs - bosproducten anders dan hout - nederlands indië - tan plants - forestry - bark - tannins - leather industry - tanstuffs - non-wood forest products - netherlands east indies
To improve the East Indian leather industry a search was made for tan barks and other tanning products, and their suitability and productivity per ha were assessed. At first (1917-1924) the study concentrated on tanning products already locally used, including those from mangrove forest, but considered also some promising local and exotic (some well known) products. For all species considered botanical data, geographic distribution and, where possible, information on bark production and quality, and on culture of the trees were discussed.
Other topics were trade in leather and tanning substances in the Netherlands East Indies, trade in mangrove bark and catch and tanned hides in the Malayan Straits Settlements, leather dressing and working in the Netherlands East Indies, research on tanning substances, experiments on practical tanning and on methods of collecting bark. Finally followed the main conclusions for supply of tanning substances for the home industry. An appendix included a key to the tree species of mangrove forest.