沙土或雪地支撑三角架假如利用这里所表示的摺叠木板来做支架,我们在沙土或雪地上便不难设法把三角架架起来了。这只要用三块(1/2)×3×14吋的木板,一端铆接在一处,在三臂的外端钻几个孔,但是并不钻过,这样便可调节三角架的位置,让它的脚支在洞眼中而不至于滑出。木板上面涂几层胶或漆还可以使它免除潮湿的腐烂。需要的话,也可以用金属板替代木板来做。(机一) Sand or Snow Supporting Tripods If we use the folding planks represented here as scaffolds, we can easily find ways to rack up tripods on sand or snow. Just use three (1⁄2) x 3 x 14吋 planks and one end is riveted in one place. Drill several holes in the outer ends of the three arms, but do not drill them. This will allow you to adjust the position of the tripod. Keep its feet in the hole without sliding out. Applying a few layers of glue or lacquer to the wood can also make it free from damp rot. If needed, you can also use metal plates instead of wood. (machine 1)