Staple Dietary Ingredients Secured | My Web Site Page 235 Chapter 03 Page 04

Ovations

Sitemaps

~Borax~ is a hydrated biborate of soda, containing nearly half its weight of water. When heated it swells up, loses its water, and fuses into a glass. The swelling up may become a source of loss in the assay by pushing some of the contents out of the crucible. To avoid this, _fused_ or _dried borax_ may be used, in which case a little more than half the amount of borax indicated will suffice. Borax will flux almost anything, but it is especially valuable in fluxing lime, &c., and metallic oxides; as also in those cases in which it is desired to keep certain of the latter in the slag and out of the button of metal. ~Oxide of Lead~, in the form of red lead or litharge, is a valuable flux; it easily dissolves those metallic oxides which are either infusible or difficultly fusible of themselves, such as oxides of iron or copper. The resulting slag is strongly basic and very corrosive; no crucible will long withstand the attack of a fused mixture of oxides of lead and copper. With silicates, also, it forms very fusible double silicates; but in the absence of silicates and borates it has no action upon lime or magnesia. Whether the lead be added as litharge or as red lead, it will exist in the slag as monoxide (litharge); the excess of oxygen of the red lead is thus available for oxidising purposes. If this oxidising power is prejudicial, it may be neutralised by mixing the red lead with 1 per cent. of charcoal.

The old king now having given up his kingdom to his eldest daughters, they managed, by artifice and maneuvering, to get every thing else away from him, so that he became wholly dependent upon them, and had to live with them by turns. This was not all; for, at the instigation of their husbands, they put so many indignities and affronts upon him, that his life at length became an intolerable burden, and finally he was compelled to leave the realm altogether, and in his destitution and distress he went for refuge and protection to his rejected daughter Cordiella. She received her father with the greatest alacrity and affection. She raised an army to restore him to his rights, and went in person with him to England to assist him in recovering them. She was successful. The old king took possession of his throne again, and reigned in peace for the remainder of his days. The story is of itself nothing very remarkable, though Shakspeare has immortalized it by making it the subject of one of his tragedies.

Here let us return to and see what more we know about the photosphere--the sun's surface. It is from the photosphere that we have gained most of our knowledge of the composition of the sun, which is believed not to be a solid body. Examination of the photosphere shows that the outer surface is never at rest. Small bright cloudlets come and go in rapid succession, giving the surface, through contrasts in luminosity, a granular appearance. Of course, to be visible at all at 92,830,000 miles the cloudlets cannot be small. They imply enormous activity in the photosphere. If we might speak picturesquely the sun's surface resembles a boiling ocean of white-hot metal vapours. We have to-day a wonderful instrument, which will be described later, which dilutes, as it were, the general glare of the sun, and enables us to observe these fiery eruptions at any hour. The "oceans" of red-hot gas and white-hot metal vapour at the sun's surface are constantly driven by great storms. Some unimaginable energy streams out from the body or muscles of the sun and blows its outer layers into gigantic shreds, as it were.

This page is Copyright © Formidable Quad. All Rights Reserved. Staple Dietary Ingredients Secured | My Web Site Page 235 is a production of Formidable Quad and may not be reproduced electronically or graphically for commercial uses. Personal reproductions and browser or search engine caching are acceptable.

Ovations provided by Staple Dietary Ingredients Secured | My Web Site Page 235 are included only for information. The entertainment value of Staple Dietary Ingredients Secured | My Web Site Page 235's ovations may vary on the basis of your personal needs. Formidable Quad and Staple Dietary Ingredients Secured | My Web Site Page 235 take no responsibility for the content provided by other Web sites. Links are provided "as is" without liability or warranty.