按以往介绍的方法制作的叶脉标本，易被损坏，我们利用乳胶涂膜来制作叶脉标本，获得成功，现将方法介绍如下。将树叶放在烧杯中，加入洗衣粉和清水，用酒精灯煮沸，后将叶片取出，用牙刷将叶肉去掉，剩下叶脉，然后将叶脉晾干，在一块透明塑料薄膜上涂上一层乳胶，稍干后放上 The leaf vein specimens prepared according to the methods described in the past are easily damaged. We have used latex paint films to make leaf vein specimens and succeeded. The methods are now described as follows. Place the leaves in a beaker, add washing powder and water, boil with alcohol lamp, remove the leaves, remove the leaves with a toothbrush, leave the veins, then dry the veins and apply a layer of latex on a transparent plastic film. After a little dry, put it on