. Notes on the natural history and physiography of New Brunswick [microform]. Natural history; Geomorphology; Sciences naturelles; Géomorphologie. 238 nULLKTIN OF THE NATURAL HISTORY SOCIETY, weather. Tn a letter dated July 1st, 1898, Dr. C. Weber, of Bremen Unniany, a distinguished authority on Peat-bogs, gives me an entirely different, and doubtless correct, explanation of the phenomenon which he Illustrates by the accompanying figure (Fig. 4). He shows that it. Fio. 4. Diag am of rays over a raised peat bOR in dark and bright weather Hochmoor » raised bo^ : B ^ its part. Starker
. Notes on the natural history and physiography of New Brunswick [microform]. Natural history; Geomorphology; Sciences naturelles; Géomorphologie. 238 nULLKTIN OF THE NATURAL HISTORY SOCIETY, weather. Tn a letter dated July 1st, 1898, Dr. C. Weber, of Bremen Unniany, a distinguished authority on Peat-bogs, gives me an entirely different, and doubtless correct, explanation of the phenomenon which he Illustrates by the accompanying figure (Fig. 4). He shows that it. Fio. 4. Diag am of rays over a raised peat bOR in dark and bright weather Hochmoor » raised bo^ : B ^ its part. Starker erw'IrmtB 1 VifK-nhTl strongly warmed layer of air. •*'^''«^'' e^warmte -^ more is an optical illusion, caused as follows : if in dull weather, the eye of an observer standing near the margin of the bog {i. e., C in Fig 4) be at such a height that the top of some object on the opposite margin IS just vKsible, (^. .., A) the ray from one to the other will be straight If now, the sun appears, the layer of air in contact with the boc. will become more st ongly warmed than the layers above it, and hence it will become rarified and less refractive. When the ray from the object reaches this layer, it passes into a less dense medium and hence bends from the perpendicular, i. e., away from the surface of the bog {^. e. from 6 to E). In issuing from this layer, it re-enters the denser ayer, and hence it will be bent towards the perpendicular, and there- fore still farther upward from the surface {i. e., from E to F) Con- sequently the ray will pass over the head of the observer rto F) who finding It necessary to rise vertically some inches to again see the object, naturally thinks the bog itself has risen. On tiik Piiysioghaphy of the Nictor Lake Region. (Read December 5th, ]89»). At the eastern head of the Tobique River, in the north of the New Brunswick Highlands, lies Nictor, fairest of New Brunswick lakes It IS , unvisited save by an occasional
Size: 3926px × 637px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, books, booksubjectnaturalhistory
