Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3758Chemical news office., 1932 |
Z wnętrza książki
Wyniki 1 - 3 z 3
Strona 260
... inch mirror , but upon realiza- tion that there were in existence two or three even this amount has proved adequate to other telescope mirrors of 60 - inch diameter , Professor Perkins insisted that the telescope for Ohio Wesleyan ...
... inch mirror , but upon realiza- tion that there were in existence two or three even this amount has proved adequate to other telescope mirrors of 60 - inch diameter , Professor Perkins insisted that the telescope for Ohio Wesleyan ...
Strona 261
... inch diameter could be finished from the crude glass , and that to cut it down to the contem- plated size of 61 inches would be a serious waste of skill which might not be duplicated . After careful consideration , the trustees of Ohio ...
... inch diameter could be finished from the crude glass , and that to cut it down to the contem- plated size of 61 inches would be a serious waste of skill which might not be duplicated . After careful consideration , the trustees of Ohio ...
Strona 262
... inch concave surface is turned back again towards the lower end of the telescope , passing through a central hole in the large mirror 9 inches in diameter , to the eye - piece or to the photographic plate . In this latter arrangement ...
... inch concave surface is turned back again towards the lower end of the telescope , passing through a central hole in the large mirror 9 inches in diameter , to the eye - piece or to the photographic plate . In this latter arrangement ...
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 |
Inne wydania - Wyświetl wszystko
Kluczowe wyrazy i wyrażenia
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