130 REPORT — 1844. 



wind observable out of doors, without going out, &c. will occur to every- 

 body*. 



It lias been placed upon any part of the balustrade (fig. 1), which may 

 have been freely exposed to the wind at the time of observation. 



II. Explanation and Remarks concerning the Journal, Sfc. 



In column A the letters " S R" and " S S" designate sunrise and sunset. 



In column B, " P" means positive charge, and " N" negative charge of the 

 conductor. 



In column C, the four regular electrical observations of the day, viz. at 

 sunrise, at 9 a.m., at 3 p.m., and at sunset, are put down. 



In columns D, E, F are contained the designations of the electrometers 

 by which each observation was made. V stands for Volta's, H for Henley's, 

 and D for the discharger. The figures preceding D are fractions, &c. of an 

 inch. 



In column E is contained the minimum and maximum charges derived 

 from observations made, generally, every hour between sunrise and meridian. 

 N.B. The early morning charges before sunrise (usually low) are not taken 

 into account. 



In column G is contained the minimum and maximum charges derived 

 irom, generally, hourly observations between meridian and about 10 p. m., the 

 nightly charges after 10 not being taken into account. 



In column I is contained, sometimes, a few very rough intimations of the 

 rate at which the charge of the conductor rises to a maximum after it has 

 been touched. 



Column K was intended for the deviations of the electro-magnetic needle, 

 but the galvanometer is not yet fitted for such notations regularly. 



Column L should contain notices of the side of the card to which the 

 needle moves. 



In column M, a few indications of the number of storms occurring in the 

 course of a day are sometimes set down. 



In column N is pointed out (by the letter S) such days as generally occur 

 when the positive charge rises after sunrise, falls early in the afternoon, and 

 rises again in the evening, accompanied by what is commonly understood by 

 the term " fine weather ;" but there are exceptions to this (rather vague) 

 definition which I believe require some habit and an acquaintance with the 

 observations of Monier, and others, particularly Beccaria, to appreciate. 



Columns O, P, Q require no explanation. The dry thermometer is our 

 standard. 



In column R the observations are not copied after the 31st Dec. 1843. 

 They were too anomalous to be of any possible use. 



In columns S and T many anomalies are to be found. 



In column U is contained (under E) the amount of evaporation in excess 

 of rain from sunset to sunset; the degrees measure hundredths of an inch in 

 the height of the water contained in A and B, fig. 16, Plate XXXI. 



In column V is contained (under R) the excess of rain above evaporation 

 for the same period. 



In the column W, the direction of the wind, as shown by the vane on the 

 dome, is marked. 



In column X, the maximum pressure of the wind from sunrise to sunset is 

 noted from the 1st of August 1843 to the 9th of February 1844. After this 



* Dr. Robinson of Armagh suggests the employment of a chain of links, &c. winding upon 

 R reel, for saving time and trouble in placing the weights in the dish. ^ 



