Laboratory Arts; a Teacher's Handbook Dealing With Materials And Tools Used in the Construction, Adjustment, And Repair of Scientific Instruments
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In our eReader you can find the full English version of the book. Read Laboratory Arts; a Teacher's Handbook Dealing With Materials And Tools Used in the Construction, Adjustment, And Repair of Scientific Instruments Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Laboratory Arts; a Teacher's Handbook Dealing With Materials And Tools Used in the Construction, Adjustment, And Repair of Scientific Instruments
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Between each washing the surface should be rubbed with a soft wet duster (cheese cloth is the best material for this purpose). A solution of stannous chloride in water to which a single drop of hydro- chloric acid has been added is then poured gently and evenly over the surface, and the object well washed in tap water, taking care not to touch the prepared surface with fingers or duster after the treatment with tin chloride.
While still wet, the object is placed in a waxed dish (see below), and... a mixture of equal volumes of the two solutions already prepared quickly poured over it, avoiding splashing and air-bubbles ; and if possible avoiding a direct stream upon the prepared surface. In about an hour the silvering will be com- plete, when the liquid may be poured off, the article cleaned and dried, and the apparatus cleaned up.
The silvered surface should not be touched with the fingers, and when quite dry may be varnished with very dilute shellac varnish, but the varnishing of deposited silver is always dangerous, owing to the contraction of the varnish upon drying.
What to read after Laboratory Arts; a Teacher's Handbook Dealing With Materials And Tools Used in the Construction, Adjustment, And Repair of Scientific Instruments?
You can find similar books in the "Read Also" column, or choose other free books by George Henry Woollatt to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Between each washing the surface should be rubbed with a soft wet duster (cheese cloth is the best material for this purpose). A solution of stannous chloride in water to which a single drop of hydro- chloric acid has been added is then poured gently and evenly over the surface, and the object well washed in tap water, taking care not to touch the prepared surface with fingers or duster after the treatment with tin chloride.
While still wet, the object is placed in a waxed dish (see below), and... a mixture of equal volumes of the two solutions already prepared quickly poured over it, avoiding splashing and air-bubbles ; and if possible avoiding a direct stream upon the prepared surface. In about an hour the silvering will be com- plete, when the liquid may be poured off, the article cleaned and dried, and the apparatus cleaned up.
The silvered surface should not be touched with the fingers, and when quite dry may be varnished with very dilute shellac varnish, but the varnishing of deposited silver is always dangerous, owing to the contraction of the varnish upon drying.
What to read after Laboratory Arts; a Teacher's Handbook Dealing With Materials And Tools Used in the Construction, Adjustment, And Repair of Scientific Instruments?
You can find similar books in the "Read Also" column, or choose other free books by George Henry Woollatt to read onlineMoreLess
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