METEOROLOGY AND CLIMATOLOGY. 
15 
For a more permanent station the form of exposure recommended by a 
committee of the British Association for use in tropical Africa will be 
found very suitable in hot countries. 
Fig. 2. Mr. H. F. BlanforeTs portable thermometer screeen. 
The thermometers are placed in a galvanised iron cage, which is kept 
locked for safety. This cage is suspended under a thatched shelter, 
which should be situated in an open spot at some distance from 
buildings. It must be well ventilated, and protect the instruments from 
being exposed to sunshine or rain, or to radiation from the ground. A 
simple hut, made of materials available on the spot, would answer this 
purpose. Such a hut is shown in the drawing (Fig. 2). A gabled 
roof with broad eaves, the ridge of which runs from north to south, is 
fixed upon four posts, standing four feet apart. Two additional posts 
may be introduced to support the ends of the ridge beam. The roof 
at each end projects about eighteen inches; in it are two ventilating 
holes. The tops of the posts are connected by bars or rails, and on 
a cross bar is suspended the cage with the instruments. These will then 
be at a height of six feet above the ground. The gable-ends may be 
permanently covered in with mats or louvre-work, not interfering with 
the free circulation of the air, or the hut may be circular. The roof may 
