Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3758Chemical news office., 1932 |
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Strona 261
... possible the completion . of the Perkins telescope . The glass disc was removed from the optical shops at Washington to the factory . of J. W. Fecker , at Pittsburgh , for grinding and polishing . Careful examination of the large disc ...
... possible the completion . of the Perkins telescope . The glass disc was removed from the optical shops at Washington to the factory . of J. W. Fecker , at Pittsburgh , for grinding and polishing . Careful examination of the large disc ...
Strona 262
... possible through the gener- osity of friends interested in the develop- ment of the Observatory's programme . In this way a very considerable saving has been made possible in acquiring the necessary accessories to put the telescope into ...
... possible through the gener- osity of friends interested in the develop- ment of the Observatory's programme . In this way a very considerable saving has been made possible in acquiring the necessary accessories to put the telescope into ...
Strona 267
... possible away from industrial areas . Two generations were fed upon pure un- treated hawthorn , after which four sub- sequent generations were fed upon hawthorn treated with lead and manganese salts respectively . Brother and sister ...
... possible away from industrial areas . Two generations were fed upon pure un- treated hawthorn , after which four sub- sequent generations were fed upon hawthorn treated with lead and manganese salts respectively . Brother and sister ...
Spis treści
The Story of the Perkins Reflector | 260 |
Decline in U S Phosphates Output | 266 |
Mohlers Test for Benzoic Acid Edward T Illing B Sc F I C | 269 |
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acid addition Analysis apparently appeared areas atomic attempt B.Sc base Beds Breccia British cent Chemical coal collected colour combination Company completion compounds consideration construction containing countries deposits described designed direct disc effective elements equipment examination Family Allowances feet four gases given glass greater H₂O heat importance inches in diameter industrial infection interest January known largest late latter less lignite lines liquid London manganese manufacturers March Maritime material measurements Meeting ment metal method mirror mounting necessary Observatory observer obtained occur operation optical oxide oxygen passed Patent Perkins placed possible PREPARATION present production Prof Professor Professor Perkins proportion published refuse replace rhenium rocks salt short tons shows skin SOCIETY spectrum standard steam Stocks Street Sulphur Table telescope tion Trade treated treatment tube United volume