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我看了1955年8月号本刊所载夏元浩同志所写“怎样绘制生物学挂图”一文以后,对我的帮助很大,但如有些学校没有反射式的幻灯机或某些城镇尚无电厂,这一方法就不能应用,因此我建议采用下列简便方法来绘制生物学挂图,供大家参考,并请指正。我们将需要放大的插图,用一块宽4寸、长5寸的玻璃片用绘画笔印绘下来,或用透明玻璃纸印绘后再贴附在玻璃片上,然后插入一个同样高5寸、宽4寸、长一尺的木箱或硬纸板匣子作为匣子的前面,再在箱子里装置一个手电筒(最好是三节干电池的,光度较强),箱子内壁漆成白色。接着,矫正光距(箱内放置手电筒与玻璃片1寸左右最为合适)就能将原图形很
After reading the article entitled “How to Draw a Biological Diagrams” written by Comrade Xia Yuanhao in the August 1955 issue of this journal, I have been very helpful. However, if some schools do not have a reflective slide projector or some towns do not yet have a power plant , This method can not be applied, so I suggest using the following simple method to draw a biological wall chart, for your reference, and please correct me. We will need an enlarged illustration of a piece of glass with a width of 4 inches and a length of 5 inches, painted with a paint brush, printed with clear cellophane, and attached to a piece of glass, then inserted into a glass plate of the same height of 5 inches and a width of 4 Inch, long one-foot wooden box or cardboard box as the front of the box, and then in the box with a flashlight (preferably three dry batteries, high brightness), the box painted white interior wall. Then, correct the optical distance (placed inside the flashlight and the glass 1 inch or so most appropriate) can be the original graphics