The Amateurs Handbook of Practical Information for the Workshop And the Laborat
The Amateurs Handbook of Practical Information for the Workshop And the Laborat
John Phin
The book The Amateurs Handbook of Practical Information for the Workshop And the Laborat was written by author John Phin Here you can read free online of The Amateurs Handbook of Practical Information for the Workshop And the Laborat book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Amateurs Handbook of Practical Information for the Workshop And the Laborat a good or bad book?
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When thoroughly melted add the salt of tartar and the lime. When these are well mixed to- gether add the arsenic, which must be carefully incorporated with the other ingredients. Take the mixture off the fire and while cooling add the camphor, previously reduced to powder by rubbing it with a little alcohol. When finished the soap should be of the consistence of thick cream and should be kept in a tightly stopped bottle. Black Varnish for Cast Iron. — For those objects to which it is applicable..., one of the best black varnishes is ob- tained by applying boiled linseed oil to the iron, the latter being heated to a temperature that will just char or blacken the oil. The oil seems to enter into the pores of the iron, and after such an application the metal resists rust and cor- rosive agents very perfectly. Black Varnish for Optical Work. — The external surfaces of brass and iron are generally blacked or bronzed with compositions given under the head of lacquers. The insides of the tubes of telescopes and microscopes should be coated with a dead black varnish so as to absorb the light and pre- vent any glare.
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