125 
of MjdinOurgk, /Session 1872 - 73 . 
and south-westerly winds, which raise the temperature during their 
prevalence to from eighty-eight to ninety-eight degrees, seldom last 
longer than a few hours; insomuch that “ their disagreeable heat 
and dryness may be escaped by carefully closing the windows and 
doors of apartments at 'their onset.”* Such sudden and short 
variations seem just what is wanted to accentuate the differences 
in question. Accordingly, the opportunity seems one not lightly 
to he lost, and the British Association or this Society itself 
might take the matter up and establish a series of observations, 
to be continued during the next few years. Such a combination 
of favourable circumstances may not occur again for years ; and 
when the whole subject is at a stand-still for want of facts, the 
present occasion ought not to go past unimproved. 
Such observations might include the following : — - 
The observation of maximum and minimum thermometers in 
three different classes of situation — videlicet , in the areas selected 
for plantation themselves, at places in the immediate neighbour- 
hood of those areas wdiere the external influence might be expected 
to reach its maximum, and at places distant from those areas where 
the influence might be expected to be least. 
The observation of rain-gauges and hygrometers at the same 
three descriptions of locality. 
In addition to the ordinary hours of observation, special readings 
of the thermometers should be made as often as possible at a change 
of wind and throughout the course of the short hot breezes alluded 
to already, in order to admit of the recognition and extension of 
Herr Rivoli’s comparison. 
Observation of the periods and forces of the land and sea breezes. 
Gauging of the principal springs, both in the neighbourhood of 
the areas of plantation and at places far removed from those areas. 
* Scoresby- Jackson’s “ Medical Climatology.” 
