The Encyclopedia Americana: A Library of Universal Knowledge ...Encyclopedia Americana Corporation, 1924 |
Iz vsebine knjige
Zadetki 1–5 od 100
Stran 7
... means designs upon stones or zinc or aluminum plates , from which impressions may be obtained by lithographic process . The first requisite for the production of a good result by this process is a suitable original . The drawing should ...
... means designs upon stones or zinc or aluminum plates , from which impressions may be obtained by lithographic process . The first requisite for the production of a good result by this process is a suitable original . The drawing should ...
Stran 8
... means of the eye when two neighboring fields of view , illuminated respectively by the two sources in question , are equally bright . The sensitiveness of the eye to inequalities of brightness does not greatly exceed 1 per cent , even ...
... means of the eye when two neighboring fields of view , illuminated respectively by the two sources in question , are equally bright . The sensitiveness of the eye to inequalities of brightness does not greatly exceed 1 per cent , even ...
Stran 9
... means of such photometers , observers will persistently set the instrument to a false position . The majority of observers find ap- parent equality at a position toward the left- hand source . The errors which are constant for a given ...
... means of such photometers , observers will persistently set the instrument to a false position . The majority of observers find ap- parent equality at a position toward the left- hand source . The errors which are constant for a given ...
Stran 11
... means ordinarily at command , be made to give constant results . In the meantime studies of the performance of the ordinary incandescent lamp have shown that we have in it , when properly prepared and handled , a source of light better ...
... means ordinarily at command , be made to give constant results . In the meantime studies of the performance of the ordinary incandescent lamp have shown that we have in it , when properly prepared and handled , a source of light better ...
Stran 12
... means of which light can be reflected along the bar . By varying the angle of the mirror the light can thus be viewed from any desired direction . Corrections must of course be made for loss of light at the surface of the mirror . The ...
... means of which light can be reflected along the bar . By varying the angle of the mirror the light can thus be viewed from any desired direction . Corrections must of course be made for loss of light at the surface of the mirror . The ...
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algæ American animals Asexual reproduction became called carpels cause cells century chief chlorophyll Church coast color consists Consult crystal disease early elected endosperm England English epidermis feet filaments flowers France French fruit fungi gametes gametophyte genus Greek important inches Indian insects island known land large number later leaves light London manufacture ment miles mountain North oogone organ parasites Paris phloem phylum physical physiology pine pipes pistil Pittsburgh plane plants plate platinum poetry Poland polarized Polish political pollen Pompeii Port Port Royal Portland Porto Rico produced Railroad rays River Roman root Russia Saint seeds sepals sexual reproduction soil South species spores sporophyte square miles stamens stems surface tain tion tissues town trees tube United University usually various vegetation vols xylem York zoospores