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生物学实验免不了要观察显微切片,要画图。在教学过程中我常发现学生花许多宝贵的时间过分偏重画图做实验报告,而相对地对进一步鑽研所观察的标本反而感到时间不够。针对上列事实,说明提高学生的画图效率,对提高实验效果及减少超学时现象,都会起一定的作用。下面介绍的显微镜描画器,就是在这个大前提下设计出来的,它的特点是大众化而又实用: 1.制造法 (1)取1毫米厚马粪纸,按图1,图2规格,各制一圆筒,并于一侧用尖快刀,各开一小窗。 (2)以同样厚纸按图3规格制两个圆片,其中心用类快刀打一6毫米直径圆孔,并按图4(即图3的侧面观)所指,于圆周之一边用
Biological experiments inevitably have to observe the microsection, to draw. In the process of teaching, I often find that students spend too much time on drawing painstakingly to do the experiment report, but they do not feel enough time to study the specimens they observe further. In view of the above facts, it shows that improving the drawing efficiency of students will play a certain role in improving the experimental results and reducing the phenomenon of extra-school time. The following description of the microscope drawing machine, is designed under this premise, which is characterized by popular and practical: 1 manufacturing method (1) take 1 mm thick manure paper, according to Figure 1, Figure 2 specifications, each A cylinder, and sharp sharp knife on one side, each opening a small window. (2) The same thick paper according to the specifications of Figure 3 two wafer system, its center with a quick knife hit a 6 mm diameter circular hole, and according to Figure 4 (ie side view of Figure 3) refers to the side of the circumference with