386 REPORTS ON THE STATE OF SCIENCE, ETC. 
8. Fossil Forest, Partick, Glasgow. Depicting stumps of coal trees in position of 
growth. J. R. Stewart, 32 Boyd Street, Largs, Ayrshire. 
9. Summit of Rough Tor, Camelford, Cornwall. Illustrating weathering of granite. 
H.M. Geological Survey. (A481.) 
10. Grand Canyon of Arizona. Illustrating river erosion in an arid climate. Detroit 
Publishing Company. (104652.) 
11. The Drei Zinnen, Illustrating erosion along joints on a colossal scale. B. 
Lehrburger, Nuremberg. (1561.) 
12 phere pl. 17625. From Album illustrating the eruption of 1906, E. Ragozino, 
aples. 
Mr. J. Allen Howe, Geological Museum, Jermyn Street, London, 8.W.1, has made 
& selection of photographs of geological subjects prepared and catalogued by the 
Geological Survey (England and Scotland). These can be obtained as prints, slides, 
negatives or enlargements at reasonable prices. 
IX. HISTORY. 
‘Wall Pictures of British History.’ London: Longmans, Green & Co. 3s. each. 
Recommended by Professor F. J. C. Hearnshaw. (Cf. pages 377 and 378.) 
X. METEOROLOGY. 
Tlustrations of meteorological principles on the scale of educational pictures 
mostly take the form of wall-maps or diagrams which are not exactly pictures. 
There are many pictures by distinguished artists which represent various aspects 
of weather, but so far as is known none of them give effective expression to the principles 
of meteorology which is the study of weather. If, therefore, educational pictures 
of meteorological subjects are desired they are not stock articles, but have to be 
“purpose made.’ With that object the following tentative suggestions may be 
put forward. Pictures of the catastrophes of weather, such as the damage done 
by floods or tornadoes, which is generally more impressive than picturesque, have 
been avoided. 
1. The Exploration of the Upper Air.—On the walls of the staircase of the Meteoro- 
logical Office is an effective picture representing the results of the exploration 
of the upper air. It is reproduced on small scale in ‘The Weather Map,’ 
Meteorological Office publication No. 225 (i), pages 46-47. 
2. British Westerly Weather.—In one of the cases on the same staircase are two 
photographs of a windy sky which could be enlarged to form a fine picture. 
In the library of the Office is a fine water-colour drawing of the same type of 
cloud by Mr. A. F. Purkin. 
3. A Storm in the Distance.—A photograph of a fine specimen of a cumulo-nimbus, 
or thunder-cloud, with a veil of false cirrus reproduced in Meteorological Office 
Glossary, page 65. 
4, A Valley Fog on a Winter Morning.—Meteorological Glossary, page 65. The same 
aspect as No. 3, but with fog instead of thunder-cloud. There are many striking 
photographs of similar fog in Californian valleys in American Meteorological 
publications. 
5. The Grey Skies of Britain.—Photograph of strato-cumulus cloud : 
(a) from below ; 
(6) from above. (Photographs of cloud-sheet from an aeroplane.) Glossary, 
age 64, 
6. The Red Skies of Sunset.—Reproductions of the coloured sketches of the sunsets 
which followed the Krakatoa eruptions. (Report of the Krakatoa Committee 
of the Royal Society, Frontispiece.) 
7. Rime.—Trees covered withfeathery ice. (Observer’s Handbook, 1919 edition, 
Plate I., page 54.) 
8, A Snow Scene.—Photographs of exceptional occasions. 
9. River Ice.—Snowfalls and frozen Thames or other river which may be found in 
the album collections of the Meteorological Office or the Royal Meteorological 
Society. 
10. The Halo Ring. Sketches by G. A. Clarke, of the Observatory, Aberdeen. 
(Report of the Meteorological Committee, 1914-15, Cd. 8028, 1915, facing 
page 54.) 
—— Ie 
Li¢are 
