198 report — 1859. 



and 15th days of the month of May is 49°'0, and the number of observations 

 49. At first quarter, upon the same six days, the mean temperature is 

 52°-2, and the number of observations 38. No observations whatever for 

 1st, 2nd, or 3rd days after first quarter occurred upon the 10th, 11th, and 

 12th days of May respectively during the 43 years. 



Again, upon the five days of the lunation at full moon (see Table II.), 

 out of the total number of 49 observations, 27 are found to fall below 50°, and 

 11 below 45°. At first quarter, out of the 38 observations, the number under 

 50° is 13 only : those under 45° do not exceed 5. 



A point of some importance in connexion with the subject should be men- 

 tioned. It did not escape Gen. Sabine's notice, when engaged on the results of 

 the Meteorological Observations at Toronto, that high mean temperatures 

 prevailed on the 1 Ith, 12th, and 13th days of May on the average of the years 

 1841-52, at that Station, and it has since been found that they prevailed also 

 at Greenwich during the same period ; the mean temperatures of the three 

 days for the 12 years were respectively 53 0, 5, 53°"2, and 54°'l instead of 

 51 0, 6, 51°"3, and 51 o- 0, which are the means of those days on an average of 

 43 years. It will be found that most of the high temperatures on the three 

 days occurred in years when the mean temperature of May itself was high*. 

 The mean of the month for 43 years is 53°. 



5. At a corresponding period of the year in autumn, the temperature of 

 the second half of lunations which fall in October is found as a rule to be 

 uniformly low ; on an average of 43 years it does not exceed 48°"9 ; whilst 

 the mean of the first half (from new to full moon) is 50 o, 4. It was so in the 

 present year ; the difference between the mean temperature of four days at 

 first quarter and the mean temperature of four days at last quarter was 23*5 

 degrees. 



Upon extracting 14 of the lowest temperatures, or minima of 43 months 

 of October, 13 were found to occur in the second half of the lunation be- 

 tween the day of full moon and the third day before new moon, and 9 of the 

 number at and immediately following on last quarter. They occurred in the 

 following years : — 



1814. 38-0 1817. 37-7 1824. 36-4 1825. 37-8 1828. 39-5 

 1834. 36-9 1836. 28-4 1838. 36-0 1839. 347 1842. 35'6 

 1843. 35-8 1845. 37"9 1848. 38-0 



It is difficult to believe that the following dates are accidental : 1814, 1824, 

 (and 1825), 1834, 1843 ; and 1817, 1828, 1838 (and 1839), 1848. 



The maxima in October also arrange themselves systematically. There 

 were 4 observations of mean temperature in 43 years which exceeded 62°. 

 They occurred in the following days and years : — vis. in 1834 on the third day 

 after new moon ; in 1819 on the second day before full moon ; and in 1848 

 and 1859 on the day of first quarter, and second day after. In 1839 the max- 

 imum was 59*7, and it occurred on the second day after new moon. The 

 mean of the month of October for 43 years is 49 0, 6. — More than 75 percent, 

 of the maxima for the month are found to occur in the first half of the luna- 

 tion. 



Lastly, the amount of cloud in October for seven years has been extracted 

 from the Greenwich Observations and formed into a Lunar Table. The 

 mean amounts for the day preceding each of the four principal phases and 



* e. g. the mean of the mean temperatures of the five days at first quarter which occur on 

 the 14th of May exceeds the mean of the five days at full moon which fall on the same day 

 of that month by "7 of a degree only. But the mean temperature of May for the five years 

 in which observations occurred on the above-named day at first quarter was not higher than 

 49°'8. lu the instances at full moon it was 51°-6. 





