By Raphael Meldola
In contrast to another reproductions of vintage texts (1) we've not used OCR(Optical personality Recognition), as this ends up in undesirable caliber books with brought typos. (2) In books the place there are photographs equivalent to photographs, maps, sketches and so on now we have endeavoured to maintain the standard of those photos, in order that they signify competently the unique artefact. even supposing sometimes there's convinced imperfections with those outdated texts, we think they should be made to be had for destiny generations to get pleasure from.
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Sample text
It has accordingly been found that the addition of organic substances, such and other acids, sugar, &c. hastens the decomposition. ,0 4 = Hg,Cl 2 + This SALTS. decomposition, change undergone by the like : . corresponding proceeds at ferric oxalate, and has been a measurable rate 2NH 4 C1 + 2CO for the utilized quantitative determination of the intensity of light. , nitrate, when spread over the surface of a sheet of paper and exposed to light, also undergo reduction accompanied by a change of colour [H].
Once, because chlorine on this is it view may be dismissed at certain that the chloride loses exposure to light, a fact Scheele so far back as the year 1777. shown by numerous analyses chloride chloride. is poorer This in may be that the change is It that the chlorine known to has been darkened than the white regarded as a direct proof a chemical one, and there are moreover several methods by which the liberation of chlorine, or at any rate some chlorine containing gas, can be directly demonstrated [A].
One tube had been exposed to light for a week or two and contained a deposit of crystalline sulphur incrusting the side of the glass, while the other, which had been kept in the dark, was perfectly clear. B (p. mental 9). For details concerning the experi- explosion of hydrogen and chlorine under the influence of light see Roscoe illustration of the and Schorlemmer's Treatise p. 011 Chemistry, vol. i. 125. C (p. 1 1). Chlorine is containing boiling water passed through a flask and the mixed gas and water vapour passed though a porcelain strongly heated in a gas combustion furnace.