Nature, Volume 108Sir Norman Lockyer Macmillan Journals Limited, 1921 |
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Página 124
... known , we can calculate its transverse speed in kilometres a second from its proper motion in seconds of arc per century , and we can determine its absolute brightness from its apparent bright- ness . For binary stars at known ...
... known , we can calculate its transverse speed in kilometres a second from its proper motion in seconds of arc per century , and we can determine its absolute brightness from its apparent bright- ness . For binary stars at known ...
Página 139
... known firm of Schimmel and Co. , of Miltitz , near Leipzig , who are among the leading manufacturers of these pro- ducts , and have contributed largely to our knowledge of their chemistry by the systematic investigations which they have ...
... known firm of Schimmel and Co. , of Miltitz , near Leipzig , who are among the leading manufacturers of these pro- ducts , and have contributed largely to our knowledge of their chemistry by the systematic investigations which they have ...
Página 152
... known to nest quite commonly in Greenland up to 82 ° 30 ' on the west side , as also in Novaya Zemlya ; while up to the present no details of breeding in the Spits- bergen group have been available . Similarly the FIG . 2. - Purple ...
... known to nest quite commonly in Greenland up to 82 ° 30 ' on the west side , as also in Novaya Zemlya ; while up to the present no details of breeding in the Spits- bergen group have been available . Similarly the FIG . 2. - Purple ...
Índice
Cusack Dr J The Arithmetic of the Decimal System 174 Doyle K D Agriculture and Irrigation in Continental | 7 |
BarrettHamilton and M A C Hinton Part | 21 |
Grandidier A obituary 286 Hamilton G H Observations of Mars at Flagstaff 447 | 32 |
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