My Web Site Page 348 Ovations 06

Ovations

Sitemaps

The only races of men that we could expect to find in Europe during the Glacial Age would be Paleolithic tribes, and it is equally manifest that we must find traces of them in beds of this age, or in association with animals that are characteristic of this age, or else we can not assert the existence of man at this time. The valley of the river Somme, in Northern France, has become classical ground to the student of Archaeology, since it was there that such investigations as we have just mentioned were first and most abundantly made. It is now well known that the surface features of a country--that is, its hills and dales, its uplands and lowlands--are mainly due to the erosive power of running water. Our rivers have dug for themselves broad valleys, undermined and carried away hills, and in general carved the surface of a country, until the present appearance is the result. It must be confessed that when we perceive the slow apparent change from year to year, and from that attempt to estimate the time required to produce the effects we see before us, we are apt to shrink from the lapse of time demanded for its accomplishment. Let us not forget that "Time is long," and that causes, however trifling, work stupendous results in the course of ages.

"Sir Humphry Davy?" said Mr. Brooke, over the soup, in his easy smiling way, taking up Sir James Chettam's remark that he was studying Davy's Agricultural Chemistry. "Well, now, Sir Humphry Davy; I dined with him years ago at Cartwright's, and Wordsworth was there too--the poet Wordsworth, you know. Now there was something singular. I was at Cambridge when Wordsworth was there, and I never met him--and I dined with him twenty years afterwards at Cartwright's. There's an oddity in things, now. But Davy was there: he was a poet too. Or, as I may say, Wordsworth was poet one, and Davy was poet two. That was true in every sense, you know."

For example, the action of sulphuric acid upon soda results in nothing which makes the action conspicuous; if, however, litmus or phenolphthalein be added the change from blue to red in the first case, or from red to colourless in the second, renders the finishing-point evident. Some indicators cannot be added to the assay solution without spoiling the result; in which case portions of the assay solution must be withdrawn from time to time and tested. This withdrawal of portions of the assay solution, if rashly done, must result in loss; if, however, the solution is not concentrated, and if the portions are only withdrawn towards the end of the titration, the loss is very trifling, and will not show-up on the result. The usual plan adopted is to have a solution of the indicator placed in drops at fairly equal intervals distributed over a clean and dry white porcelain-plate: a drop or two of the solution to be tested is then brought in contact with one of these and the effect noted. Another plan is to have thin blotting-paper, moistened with a solution of the indicator and dried; a drop of the solution to be tested placed on this shows the characteristic change. When the assay solution contains a suspended solid which interferes with the test, a prepared paper covered with an ordinary filter-paper answers very well; a drop of the solution to be tested is placed on the filter-paper, and, sinking through, shows its effect on the paper below.

This page is Copyright © Cake Placebo. All Rights Reserved. My Web Site Page 348 is a production of Cake Placebo and may not be reproduced electronically or graphically for commercial uses. Personal reproductions and browser or search engine caching are acceptable.

Ovations provided by My Web Site Page 348 are included only for information. The entertainment value of My Web Site Page 348's ovations may vary on the basis of your personal needs. Cake Placebo and My Web Site Page 348 take no responsibility for the content provided by other Web sites. Links are provided "as is" without liability or warranty.