160 



From this Table the following has been prepared, showing the 

 amount of Evaporation and Eain-fall for each week during the year. 



JEvaporation and Rain-fall in Dublin, for each week of the year 1860. 



Week. 



Evapo- 

 ration. 



Rain-faU. 



Week. 



Evapo- 

 ration. 



Rain-faU. 



I. January 



7 



Inches. 

 0-273 



Inches, 

 0-773 



XXVI. 



June 



30 



Inches. 

 1-519 



Inches. 

 0^489 



II. 



14 



0-221 



0 



-761 



XXVII. 



July 



7 



1^130 



0 



000 



nr. 



21 



0-382 



0 



-782 



XXVIII. 



11 



14 



1 



175 



0 



515 



IV. 



28 



0-542 



1 



-542 



XXIX. 



11 



21 



0 



962 



1 



582 



V. February 



4 



0-061 



0 



-111 



XXX. 



11 



28 



0 



906 



0 



326 





11 



0-340 



0 



•370 



XXXI. 



August 



4 



0 



988 



0 



•458 



VII. „ 



18 



0-295 



0 



-065 



XXXII. 



11 



11 



1 



202 



0 



•672 



VIII. 



25 



0-360 



0 



•020 



XXXIII. 



11 



18 



0 



737 



2 



•137 



IX. March 



3 



0-615 



0 



-395 



XXXIV. 



11 



25 



0 



700 



1 



•100 



X. „ 



10 



0-467 



0 



•287 



XXXV. 



September 1 



1 



367 



0 



•387 



XI. „ 



17 



0-437 



0 



•917 



XXXVI. 



11 



8 



0 



•593 



0 



-343 



XII. „ 



24 



0-871 



0 



-871 



XXXVII. 





15 



1 



029 



1 



•169 



XIII. „ 



31 



0 618 



0-478 



XXXVIII. 



11 



22 



0 



769 



0 



-969 



XIV. April 



7 



0-938 



0 



348 



XXXIX. 



11 



29 



0 



630 



0 



•160 



XV. „ 



14 



0-795 



1 



•135 



ITT 



October 



6 



0 



710 



0 



•050 



XVI. „ 



21 



1-068 



0 



018 



XLI. 





13 



0 



631 



0 



•601 



XVII. „ 



28 



0-978 



0 



238 



XLII. 





20 



0 



•701 



0 



•811 



XVIII. May 



5 



1-207 



0 



887 



XLIII. 



11 



27 



0 



•530 



0 



•310 



XIX. „ 



12 



1-022 



0 



662 



XLIV. 



November 3 



0 



•267 



0 



-617 



XX. „ 



19 



1-162 



0 



882 



XLV. 



11 



10 



0 



511 



0 



-291 



XXI. „ 



26 



1-231 



0 



751 



XL VI. 



11 



17 



0 



321 



0 



-521 



XXII. June 



2 



1-143 



1 



173 



XLVII. 



11 



24 



0 



180 



0 



•670 



XXIII. „ 



9 



0-700 



1-700 



XL VIII 



December 1 



0 



503 



1 



773 



XXIV. „ 



16 



1-087 



1 



717 



XLIX. 



11 



8 



0 



247 



1 



447 



XXV. „ 



23 



1-042 



0- 



342 



L. 



11 



15 



0 



100 



0 



120 



In the diagram (Plate XYII.), I have laid down the curve of eva- 

 poration from this Table ; the abscissae being measured in weeks^ and 

 the ordinates in tenths of inches. It is clearly seen from the curve that 

 the evaporation, unlike the rain-fall, depends directly on the sun's de- 

 clination, reaching its maximum of 1*2 inches per week at the summer 



