By Earle R. Caley
Read Online or Download Analysis of Ancient Metals PDF
Best analysis books
Writer: Cincinnati, collage press matters: Maxima and minima Notes: this is often an OCR reprint. there is various typos or lacking textual content. There aren't any illustrations or indexes. for those who purchase the overall Books version of this booklet you get unfastened trial entry to Million-Books. com the place you could make a choice from greater than 1000000 books at no cost.
Business techniques corresponding to long-wall coal slicing and me- tal rolling, including definite parts of 2nd sign and photograph processing, convey a repetitive, or multipass struc- ture characterised through a chain of sweeps of passes via a identified set of dynamics. The output, or move profile, produced on each one move explicitly contributes to that produced on the textual content.
- Corso di matematica superiore
- Vorlesungen ueber allgemeine Funktionentheorie und elliptische Funktionen
- Radar System Analysis, Design and Simulation
- Conversation Analysis: Studies from the First Generation
- Harmonic Analysis on Semigroups: Theory of Positive Definite and Related Functions
- Real Analysis and Applications: Theory in Practice
Additional info for Analysis of Ancient Metals
Step 6. Add 5 ml of a 1 per cent ethanolic dimethylglyoxime solution, stir, and stand for about 10 min. If there is no precipitate, proceed to Step 7. If a red precipitate appears, this indicates the presence 28 ANALYSIS OF ANCIENT METALS of nickel. Filter off the precipitate, wash a few times with small portions of water, and use the filtrate and washings for Step 7. Step 7, Add 10 ml of concentrated nitric acid and evaporate to dryness. Dissolve any residue in 10 ml of water, and filter if necessary to remove any insoluble matter.
A precipitate indicates the presence of silver. Heat to coagulate the silver chloride, filter, wash with a few small portions of 1 per cent nitric acid, and use the filtrate and washings for Step 3. Step 3. Add 1 ml of concentrated sulfuric acid to the solution contained in a beaker and evaporate on a hot plate until white fumes of sulfur trioxide first appear. Cool, add 25 ml of water and stir to dissolve the salts. If all the salts dissolve, use the solution for Step 4. If a heavy white crystalline residue of lead sulfate remains, this indicates the presence of lead.
Nearly all the published information on the specific gravity of such coins is contained in the books a n d articles listed below. Many of the figures for specific gravity and fineness contained in these publications are expressed to a higher degree of accuracy than is warranted by the methods used to obtain them, and the correctness of some of these figures, especially those obtained on very small coins and those of low gold content, is questionable. Nevertheless most of this information is useful.