235 
3. Pneumonia seems to be very greatly influenced by the 
mean temperature, the disease-curve rising as the temperature 
falls, and vice versa. 
4. Bronchitis and Catarrh. The curve of these diseases, 
although drawn from ten times the number of cases, is almost 
identical with that of pneumonia, its highest and lowest points 
coinciding exactly with those of the pneumonia-curve. 
5. Pleurisy. This disease is too irregular in its course to 
yield any information in the present investigation, as the 
meteorological elements under consideration do not appear 
to have any apparent connexion with it. 
6. Continued Fever. It is difficult to trace any connexion 
between the progress of this disease and atmospheric states ; 
but on the whole, high temperatures seem rather favourable 
to its production, and extreme cold is probably opposed 
thereto. 
7. Rheumatic Fever. The curve of this disease is not 
sufficiently extended to admit of accurate comparison with 
meteorological curves, and therefore no satisfactory conclusion 
can be drawn respecting it. 
8. Measles. In its chief undulations the measles-curve 
seems to rise with the fall of the temperature, and vice versa, 
and the influence of this element is best marked when it is 
above or below the forty-three years average. 
9. Whooping Cough seems to be much influenced by the 
extremes of beat and cold, the curve, on the whole, rising 
with the fall, and sinking with the rise of temperature. 
10. Scarlatina. A large amount of aqueous vapour in the 
air appears greatly to facilitate the formation and action of 
the peculiar scarlatinal poison, especially when this is accom- 
panied by sudden fluctuations in the atmospheric pressure, as 
shown by the barometer ; a diminished pressure being favour- 
able to the disease. 
It is rather difficult to separate the influence of temperature 
from that of humidity, but a moderately low temperature 
