De stroming van het grondwater hangt af van de eigenschappen van het medium en van zekere voorwaarden aan de grenzen van het beschouwde gebied. De stroming in de onverzadigde zone heeft alleen een bijzondere invloed op de stroming in de verzadigde zone bij niet-stationaire toestanden. Bij stationaire stromingen kan de onverzadigde zone buiten besch...
The following conclusions could be made:If for volume table construction, the form factor (f), instead of the volume (v), is used as the dependent variable, better results are obtained.It matters little whether f is estimated from the diameter (d), or from d and height (h) together.Estimating v (or, if more convenient, the so-called form height fh)...
Some new methods were developed of estimating stem number N, regression height h -d , diameter d -V of the tree of mean volume, and the increment I . Methods for the determination of N were discussed. The theory about the distance method was explained. Essed defended to use the median m 4 of the distances measured from points chosen systematically ...
Differential thermal analysis (DTA) as a method of analysing properties of chemical compounds, more especially of clay minerals, developed rapidly, but lack of quantitative interpretations left many problems to be studied. A historical review was presented, showing the purpose of the study. Equipment was descibed in detail, with special attention t...
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 taxo...
