Philosophical Magazine, Volume 5Taylor & Francis., 1829 - Physics |
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Page 164
... schorl , often two or three feet wide , intersect the granite in a nearly perpendicular position , and appear like black ribbons on the white wall of the granite . They are to be seen for the length of four or five hundred feet . Two ...
... schorl , often two or three feet wide , intersect the granite in a nearly perpendicular position , and appear like black ribbons on the white wall of the granite . They are to be seen for the length of four or five hundred feet . Two ...
Page 242
... schorl at a depth of thirty or fifty feet under grass ; the quartz prevails more in these places than the fel- spar , and the rock has not undergone so perfect a decomposi- tion as in other parts ; this rock forms a transition to the schorl ...
... schorl at a depth of thirty or fifty feet under grass ; the quartz prevails more in these places than the fel- spar , and the rock has not undergone so perfect a decomposi- tion as in other parts ; this rock forms a transition to the schorl ...
Page 268
... schorl , twelve feet in diameter . It does not consist of schorl only , but is a confused aggregate of white translucent quartz , of opaque cream - coloured felspar , of greenish yellow mica , and the schorl is intermixed in shapeless ...
... schorl , twelve feet in diameter . It does not consist of schorl only , but is a confused aggregate of white translucent quartz , of opaque cream - coloured felspar , of greenish yellow mica , and the schorl is intermixed in shapeless ...
Contents
JANUARY | 1 |
Capt B Halls Letter inclosing a Communication from Peter | 15 |
Mr Ivory on the Method of deducing the Difference of Lon | 24 |
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abdomen acute Amplitude de l'arc angle Antennæ apex appears Barcelone basal joint Bear's Head bipectinated Brit characters ciliated Cloudy colour contains crystals Curtis cylindric deflexed degrees densely deux distance elongate Ernst étoile experiments fait fascicles of hair feet female femora gallic acid genus gneiss grains Grande Ourse granite granite vein Haust head small heat Hübn Icon Illust inches killas Lake Lake Ontario Larva Larvæ latitude Latr legs length Linn Lithosia males manganese manganite maxillæ mean Méchain méridien miles minute Mont-Jouy muriatic nearly observations obtuse occur Ochs Ochsenheimer Ourse oxide oxygen Palpi pectinations Penhill peroxide pilose plane porrected posterior potash precipitate pupa quantity quartz rain robust rock scales schorl Settronside short side slender species steatite Steph stout strata sulphuric sulphuric acid surface tannin temperature terminal thorax tibiæ tion triarticulate tube tuft Whernside wings