比重计分析是南京观測队泥沙室分析項目之一,每次分析是15点沙样,即15个量筒。 以前我們按照此重計分析操作时間表,須二人同时用攪拌器(小于量筒內徑的白鉄皮,上有几个小孔,焊在粗鉛絲上做成)在量筒里上下提压,使泥沙顆粒分离,要求每分鐘上下三十次,每个量筒攪拌二分鐘,然后放在稳定的桌上进行 Gravimetric analysis is one of the sediment analysis projects of Nanjing Observation Team. Each analysis is 15 sand samples, that is, 15 measuring cylinders. In the past, we analyzed the operation schedule in accordance with this re-count, to be two at the same time with a blender (less than the inner diameter of the cylinder white leather, there are a few holes, made of welded on the thick lead wire) up and down in the measuring cylinder pressure , So that sediment particles separated, requiring thirty times per minute up and down, each measuring cylinder for two minutes, and then placed on a stable table