The Preparation And Mounting of Microscopic Objects
The book The Preparation And Mounting of Microscopic Objects was written by author Thomas Davies Here you can read free online of The Preparation And Mounting of Microscopic Objects book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Preparation And Mounting of Microscopic Objects a good or bad book?
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They are generally very much interrupted in their structure ; but by turning over a considera- ble quantity of the ordinary saltpetre* of the shops specimens are readily found which have perfectly transparent portions of some extent. Selecting one of these, cut it with a knife into a plate above a quarter of an inch thick, directly across the axis of the prism, and then grind it down on a broad wet file till it is reduced to about one quarter or a sixth of an inch thick, smooth the surface on a... wet piece of emeried glass, and polish on a piece of silk strained very tight over a strip of plate-glass, and rubbed with a mixture of tallow and colcothar of vitriol. This operation requires practice. It cannot be effected unless the nitre be applied wet and rubbed till quite dry, increasing the rapidity of the fric- tion as the moisture evaporates. It must be performed in gloves, as the vapour from the fingers, as well as the slightest breath, dims the polished surface effectually. With these precautions a perfect vitreous polish is easily obtained.
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