被烧制灼热。他们在一百分沙粒，三十五分白垩，四十分硫酸钠里掺了两三分煤屑，就构成了那种制玻璃用的物质，混和在一起放在坩埚里。当炉里的高温使原料化为液体的时候，更确切地说变成胶状物时，赛勒斯?哈顿就用吹管蘸了一些，他在预先准备好的一块金属板上滚了滚吹管，做出一个适合于吹的形状来，然后把吹管递给赫伯特，教他吹另外的一端。
the tool， the manufacture of which presented the most difficulty， was the pipe of the glass-maker， an iron tube， five or six feet long， which collects on one end the material in a state of fusion. but by means of a long， thin piece of iron rolled up like the barrel of a gun， pencroft succeeded in making a tube soon ready for use.
on the 28th of march the tube was heated. a hundred parts of sand， thirty-five of chalk， forty of sulphate of soda， mixed with two or three parts of powde
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