中学生物学教学中,常常需要进行显微镜观察。如果给显微镜装上一个指针,观察的效果就会更好些。安装指针的方法是:将接目镜的下盖旋下,在镜筒内壁的光栅上,用加拿大树胶粘上一小段长5毫米左右的头发(如图)。粘毕,把下盖旋上,竖放目镜,待胶凉干即成。装上指针后,不论同学观察或教师进行辅导都很方便,特别是观察示范镜时,就更方 High school biology teaching, often need to be microscopically observed. If you attach a pointer to the microscope, the observation will be better. The method of installing the pointer is: unscrew the lower cover of the eyepiece, and glue a short piece of hair about 5 mm long on the grating on the inner wall of the barrel with the Canadian tree glue (as shown in the figure). Sticky finish, the lower cover spin, erect eyepiece, to be dry glue Serve. With the pointer, regardless of classmates or teachers counseling are very convenient, especially when observing the model mirror, even more