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这次出席全国先進生產者代表会議的周介度同志,是一位制作教具富有創造性的老教师,他带动杭州一中物理組的同志做了很多演示教具和学生分組实驗用的仪器。他做过一种做演示教具用的教具——用普通幻灯改裝的“直立式幻灯”。幻灯,一般是平着放置,放映画片、膠片一类直立物体,不能够用來放映再大、再复雜的东西。現在周介度同志将幻灯豎立起來,使里面放图片那部分空間擴大,擴大到能容納实驗仪器;另在镜头外面斜嵌一平面鏡,与鏡头成四十五度,使直立幻灯向上方透射仪器的光束在平面鏡上反射后,作恰为直角的轉折投到前方幕布上去。經过这一改装,幻灯的用处就大多了。有一些实驗,例如各种表面張力現象——綉針浮在水面不沉,点破肥皂泡薄膜能
This time, Comrade Zhou Jiedu, who attended the meeting of the representatives of advanced producers in the country, was a creative and old teacher who made teaching aids. He led many comrades in the Physical Education Group of Hangzhou to do a lot of experiments to demonstrate the teaching aids and student groups. He did a teaching aids for demonstration teaching aids - “vertical slide” converted with ordinary slide. Slide, usually placed flat, screening films, film, a class of objects, can not be used to show another big, complex things. Now Zhou Jindu comrades will be erected slides, which put inside the picture that part of the space expanded to expand to accommodate the experimental apparatus; the other outside the lens embedded in a flat mirror oblique, and the lens into forty-five degrees, so that upright slide light transmission device Beam of the light reflected in the plane mirror, just for the right corner of the transition to the front curtain up. After this modification, slideshow will be most useful. There are some experiments, such as various surface tension phenomena - embroidered needle floating in the water is not sinking, breaking soap bubble film can