Chase.] C9Q [18GS. 



ginal notes, " gauge out of order," " rain gauge did not register 

 the hourly fall throughout this month," &c., makes it difficult to 

 decide how much weight should be attached to its records. The 

 Hospital register rarely fixes the limits of a storm with sufficient 

 precision. Prof. Kirkpatrick notes the time of beginning and 

 ending during the day hours, and in some cases at night, and 

 he also gives the amount of fall, after April 1, 1854. When- 

 ever I desired to consider that amount in connection with his 

 earlier observations, it was taken from the Hospital register. 

 Where no more definite marking was available the rain of each 

 storm was distributed equalh' over the hours of its continuance, 

 the night being considered as beginning at 11 h. 30 m.. and end- 

 ing at IG h. 30 m. From the observations thus arranged the 

 deviations from the mean values were calculated, and those de- 

 viations were joined to the Hospital means in order to secure 

 uniformity of standard for comparison. 



A combination of the monthly values (Table X.) furnishes the 

 following results : 



I. ■:: ^ 



S3? 



Mean of March and September (equinoctial).. 140.4 



■' one month from equinoctial months. 1.54.7 



" one month from solstitial mouths... . 1.57.7 



" June and December (solstitial)) l{)7.t) 



II. 



" December and January (perilielion).. 150.4 



" November and February 138.7 



" October and March '. IKi.S 



" September an d April 153.8 



" August and May 180.3 



" July and June (aplielion) 172.3 



" October to March, inc. (perihelion)... 14.'>.'2 



" Api'il to September, inc. (aphelion)... 168.7 



" November to Febr'y, inc. (perihelion) 144.5 



" Sept., Oct., March, April (equinoctial) 1.50.2 



" May to August, inc. (aphelion) 17U.3 



III. 



" March and April (vernal equinox) 152.4 



" Jan. to June, inc. " 154.3 



" Sept. and Oct. (autumnal equinox) 147.9 



'• July to Dec. inc. " 159.7 



IV. 



Spring 158.8 



" Summer 177.9 



" Autumn 148.4 



Winter 142.9 



V. 



" April to August (Full Moon doc. S.) ... 172.4 



" Oct. to Feb. (Full Moon dec. N.). 144.6 



VI. 



" "Warm Semester ins.8 



" Cool Semester 145.2 



