( XV ) 
affording tho means of ensuring an effectual system of filtration. 
The deaths by small-pox and measles declined in London during Iho 
three months under review as compared with the same period of 1868, 
while tho deaths from scarlet fever and whooping-cough increased. 
The total number of emigrants in the quarter (ended 30th June) 
■was 113,074. Of these, 30,839 were of English origin; 8256, 
Scotch; 34,739, Irish; 37,935 foreigners; and 1305 were persons 
whoso origin was undistinguished. Of the total emigration, 89,361 
persons went to tho United States; 19,242 to North America ; and 
3670 to the Australian colonies. 
METEOEOLOGY. 
White)- Quarter (January, February, Marcli). — At Greenwich the 
months of January and Febniary, Avith the exception of a short 
period extending from 19th to 25th of January, were remarkably 
warm. Up to March 1st the excess of temperature averaged more 
than b\° Aaily. On March 2nd a change took place, and a period 
of cold and wintry weather set in, and continued until the end of 
the quarter. The average deficiency of temperature during this 
period exceeded 4° daily. The mean daily temperature of the 
quarter shows an excess of more than 2°. 
The mean temperature of January was 41°"1, or 4°'9 higher than 
the average of 98 years ; higher than the corresponding temperatures 
in 1867 by 6°-9, and in 18G9 by 3°-9, but lower than in 1866, when 
42°* 6 was recorded. 
The mean temperature of February was 45°'3, or 6°-9 higher than 
the average of 98 years, and, with the exception of 1779, higher 
than the corresponding values in any year from 1771 to 1868. 
The mean temperature of IMarch was 37°'5, or 3°'5 lower than the 
average of 98 years, and 6-5 colder than in 1868. 
The fall of rain was 1*1 inch, and 0-7 inch in excess in January 
and February, but 0-2 inch in defect in March. 
The mildness of the weather in January and Februaiy rendered 
important service to the grazier ; the grass-lands afforded sufficient 
nourishment to enable him to carry his live stock over the winter 
without the difQculty that was anticipated. By the end of February 
vegetation was remarkably forward, being from three to four weeks 
in advance of ordinary seasons. In out-door agricultural work little 
progress was made during these two months, owing to the land, in 
many places, being too moist for working. During the greater part 
of March vegetation was nearly stationary : this check, however, 
was advantageous. By the end of the quarter vegetation Avas nearly 
in tho same state as at the end of Febrnar}', except grass-lands, 
