REPORT 1870. 



The ratio of minus readings to phis readings was, in Januaiy and February, 1 to 5 

 at all hours during the day hours ; in March, April, August, and September during 

 the day, one of equality, Li May, June, and Julj'' the ratio was 3 to 2, in October 1 

 to 4, in November 1 to 7, and in December 1 to 10. At the hour of 9 p.m., 

 throughout the year, it was 1 to 7 ; the monthly means of these differences in each 

 year are shown m the following Tabic : — 



Monthly means of excess and defect of Temperature at 22 feet, above and below 



that at 4 feet. 



Date. 



Jan. 1867. 

 1868. 

 1S69. 

 1870. 



Febr. 1S67. 

 1868. 

 1869. 



1870. 



Mar. 1867. 

 1868. 

 1869. 

 1870. 



April 1867. 

 1868. 

 1869. 

 1870. 



Muy 1867. 

 1868. 

 1869. 

 1870. 



June 1867. 

 1868. 

 1869. 

 1870. 



Differences. 



9 A.M. Noon. 3 P.M. 9 p.m 



+0-48 

 0*24 

 0-43 



+ 0-66 



4-o-i6 

 0-33 



O'lO 

 4-0'I2 



— 0'26 



o'3i 

 0-39 



— 0'22 



-0-59 



0"27 



ros 

 -0-54 



-o'93 



0-37 

 0-43 



— 79 

 -0-44 



099 



0-95 



-0-68 



'+0-31 



0'23 



o'5o 



+0-37 

 o"4i 

 o'34 



,+o'39 

 I— 0'07 



+ 0'20 

 O'OO 



— O'OI 



— o' 18 I — ©•17 



0-93 1+0-25 



o'3o j o'o8 

 -0-37 +o'44 



-o-o8 



0"21 



o"6o 



-0-87 



4-0-24 

 o-ii 



0-28 



+0-23 



— 0*04 

 +0-07 



0-05 

 +0-05 



— 0-65 

 +0-32 



— 0-27 



— 0-26 



+0-10 



— o'i9 



0-52 



-1-13 



-0-51 

 1-23 

 0-56 



-1-17 



+ 0-22 



— 061 

 0-82 



— 1-02 



Date. 



Differences. 



9 A.M. Noon. 3 P.M. 9 p.m. 



+0-70 

 0-38 

 0-60 



+o'S4 



+0-46 

 0-45 

 o-6i 



+°"45 



+0-31 

 0-39 

 0-50 



4-0-54 



4-0-34 

 0-53 

 0-36 



+ 0-88 



4-0-47 

 0-30 

 0-37 



4-0-81 



-1-0-76 

 0-72 

 1-07 



4-o-8o 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



1867., 

 1868., 

 1869., 

 1870., 



1867. 

 1868. 

 1869. 



1870. 



1S67. 

 1868. 

 1869. 

 1870. 



1867. 

 1868. 

 1869. 

 1870. 



1867. 

 1868. 

 1869. 

 1870. 



1867. 

 1868. 

 1869. 

 1870. 



— O' 



I r 

 °' 



— O' 



— o 



° 

 I' 



; — I 



— O 

 I 



— o 





-0-45 

 -028 

 -f-o-io 



+0-14 



0-22 



4-0-36 



4-0-50 



0-38 



+0-49 



-0-34 



1-72 



08 1 



— o'4i 



-1-0-29 



-0-97 

 0-31 



— 0-96 



— 0-I2 



i-io 



— 0-46 



— 0-24 



— 0-27 

 4-0-18 



— o-io 



4-0-04 



4-0-26 



4-0-31 



0-42 



0-22 



4- 



4- 0-40 



-177 

 i-io 



— 0-65 



+0-63 

 -0-38 

 4-0-20 

 -0-78 



-f 0-2I 



— 0-24 

 0-00 



4-o-6o 



0-55 

 .0-78 



+ 1-04 



4-0-78 

 0-50 

 083 



4-1*30 



-fo-63 



0-68 



4-o-8o 



4-0-51 i+070 



0-48 j I-I2 



-f o"89 !4-i-o6 



-1-0-7S 

 0-44 



4-0-53 



4-0-50 



0-41 



4-0-31 



4-0-91 



0-42 



4-0-93 



4-0-24 



0-52 



4-0-39 



From the above Table it will be seen that the 7man temperature of the air at 

 22 feet height was higher than at 4 feet, at all hours of the day and night, during the 

 months of January, February, November, and December; in the earl)' afternoon, 

 and during the night, in the months of March, April, August, September, and 

 October; and in the evening hours, and during the night, in May, June, and July. 



The mean monthly temperatures of the air at 22 feet height, for all the years, were 

 then taken, and found to differ from those at 4 feet, as follows: — 



At Qh A.M. 



18G7-70, January. 4-6-5 



~" " * "1-9 



Februai-y 

 March 

 April . , 

 May . , 

 June . . 

 July , 



August 



4-0-: 

 -0-; 

 

 

 

 

 1 

 1 

 



1867-09, September 



October 



November -1-0 



December -f 



At Noon. 



o 



4-0-2 



00 



-0-2 



0-5 



0-4 



0-9 



0-8 



0-5 



0-6 



-01 



4-01 



4-0-.3 



