This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...series a may perhaps be associated with a very weak fluorescence series falling between D and E. Two bands of such a series were occasionally observed at 1,968.0, and 2,053.4 (interval 85.4). The interval between the line at 2,053.4 and the first line of series a is 70.6, which is almost exactly the ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...series a may perhaps be associated with a very weak fluorescence series falling between D and E. Two bands of such a series were occasionally observed at 1,968.0, and 2,053.4 (interval 85.4). The interval between the line at 2,053.4 and the first line of series a is 70.6, which is almost exactly the average interval for the absorption series. Again, in the case of series h we might expect an absorption band to fall at 2,078.7, while series H might have a fluorescence band at nearly the same point, viz, 2,079.3. Neither band was observed; but it must be remembered that the detection of reversible bands is only possible when the conditions of excitation are suitable. Any trace of fluorescence tends to mask an absorption band, and vice versa. The scarcity of bands, either of fluorescence or absorption, in the "reversal region" lying between 2,060 and 2,120 is perhaps due to this cause. There are other cases which suggest the same relationship between fluorescence and absorption series, although less definitely. While there are thus strong reasons for believing that certain fluorescence series are to be looked upon as associated, in the manner indicated above, with absorption series, yet there are several series in the fluorescence spectrum for which no related absorption series have been observed; and, on the other hand, there are several absorption series which do not appear to be related with the observed fluorescence. In this respect the systematic relation of fluorescence and absorption is not so completely brought out as in the spectra of the chlorides. The observed intervals between bands are not so nearly constant in the case of the absorption series as in the fluorescence series. It seems to us probable that this is due to...
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Seller's Description:
This book has board covers. Ex-library, With usual stamps and markings, In fair condition, suitable as a study copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 700grams, ISBN:
