Nature, Volume 11Sir Norman Lockyer Macmillan Journals Limited, 1874 - Electronic journals |
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Page 19
... plane , the vibra tions of the fork being maintained by an electro - magnet and contact - breaker . The telescope being directed to a distant object presenting a brilliant point , and the electro - magnet put into action , the point ...
... plane , the vibra tions of the fork being maintained by an electro - magnet and contact - breaker . The telescope being directed to a distant object presenting a brilliant point , and the electro - magnet put into action , the point ...
Page 31
... planes , black poplars , apple - trees , peaches , & c . , fruit of all kinds in great variety , and very good . Crops are maize , wheat , barley , cotton , madder , tobacco , poppy , lucerne , sesamum , & c . Everything is irri- ABOU ...
... planes , black poplars , apple - trees , peaches , & c . , fruit of all kinds in great variety , and very good . Crops are maize , wheat , barley , cotton , madder , tobacco , poppy , lucerne , sesamum , & c . Everything is irri- ABOU ...
Page 51
... plane ; then the law required is as follows : -There must be a plane of maximum index , at which the rate of variation of index with height must be zero ; and as we ascend or descend from this plane of reference the rate of variation of ...
... plane ; then the law required is as follows : -There must be a plane of maximum index , at which the rate of variation of index with height must be zero ; and as we ascend or descend from this plane of reference the rate of variation of ...
Page 52
... plane of reference , and the horizontal distance between the two being the same as in the preceding case . This property is illustrated by Fig . 2 . It is obvious that the conjugate foci will occur not in pairs merely , but in sets of ...
... plane of reference , and the horizontal distance between the two being the same as in the preceding case . This property is illustrated by Fig . 2 . It is obvious that the conjugate foci will occur not in pairs merely , but in sets of ...
Page 54
... plane surfaces of four solid rectangular iron bars ; and all being tightly compressed with iron clamps in the form of hollow squares and with iron wedges , the whole is heated in a furnace till red hot , when the clamps are further ...
... plane surfaces of four solid rectangular iron bars ; and all being tightly compressed with iron clamps in the form of hollow squares and with iron wedges , the whole is heated in a furnace till red hot , when the clamps are further ...
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Academy acid Amú animals appears Arctic astronomical atmosphere birds botany Capt carbon carbonic acid centimetres chemical chromosphere coast College colour comet contains deposits depth described discovery doubt effect English existence expedition experiments fact Fallow Deer fathoms favourable fish flame flowers foraminifera fossil geological given gives Globigerina Globigerina ooze Greenland heat hydrogen important insects interest investigation Islands lectures Lepidoptera lines magnetic matter means memoir ment metalloids method motion Museum Natural History Novaya Zemlya object observations Observatory obtained paper Paris Paris Observatory passed perihelion Phylloxera plane plants portion present president probably produced Prof question recent reference regard region remarks researches river Royal Society scientific seen sound species specimens spectrum Spitzbergen stars Stigmaria surface taken temperature theory tion Transit of Venus Zealand