-ZSG RESULTS OF THE MF.TEOROLOGIGAL OBSERYATIONS TAKEN DUEING 



The following table shows the departure from the mean in thousandths of an inch 

 for the months and the seasons :— 



Showing the Departure fuom the Mean op Hourly Values of Barometric Pressure at Cape 

 Pembroke Lighthouse, Falkland Islands, Three Years 1903-1905. Lat. 51° 41' S., Long. 57° 42' W, 



Thousandths of an Inch. 



Note. — The heavy type iudiciites above the average, and tl.e italic type below tln' average. 



The above values have been corrected for midnight differences, but have not been 

 smoothed in any way. 



Dealing with the seasonal and annual results (see Plate 111.), the following 

 characteristics are shown : — 



Spring. — At this season the morning minimum and maximum are hardly noticeable, 

 the most conspicuous feature being the deep afternoon minimum and high evening 

 maximum, which are more pronounced than at any other season of the year. 



In Summer the general features of the curve are much the same as in Spring. The 

 morning minimum is feebly marked, while the morning maximum is well shown. There 

 is a long-drawn-out afternoon minimum, the values being below the mean of the day from 

 9 A.M. to 5 P.M., the absolute minimum being reached at 2 p.m., or one hour later than in 

 Spring, while the evening maximum is also slightly retarded. 



In Autumn the curve, as compared with those of the two previous seasons, shows 

 important modifications. The double maxima and minima are clearly shown, and. at 

 this season the mornincj minimum falls below the mean of the dav. The morning 

 maximum is retarded till about 8.30 A.M., while the afternoon minimum is reduced and 

 occurs at 2 p.m. ; the evening maximum is small and ill-defined. 



In Winter the morning minimum is deeper and more conspicuous than at any 

 other season, and is succeeded by a short maximum which occurs at 10 a.m. ; the after- 

 noon minimum, while comparatively deep, is spread over a short period, while the 

 evening maximum extends over the nine hours ending with 1 a.m. 



Taking the Annual values, the double period is clearly seen, but the afternoon 



