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X. Report on the Instruments employed in, and on the Plan 

 of a Journal oj \ Meteorological Observations kept in the 

 Garden of the Horticultural Society at Chiswick. 



Read February 7, 1826. 



Xh e Register of Meteorological Observations for the year 

 1825, of which an Abstract* has been laid before the Society, 

 was carried on with such instruments as were quickly at- 

 tainable, after the determination of the Committee on the 

 subject had been made. Considerable pains were, however, 

 taken to procure for the next year more perfect ones, under 

 the best advice and assistance which could be obtained ; the 

 object being to give the Register such a character for ac- 

 curacy, as would render it not only useful to the purposes 

 of Horticulture, but for the deeper researches of those men 

 of science, whose attention it was known were at the time 

 particularly directed to the subject. 



The following account and description of the Instruments 

 used for the observations of the year 1826, has been prepared, 

 and will, it is presumed, be found generally acceptable, and 

 especially so to those who are engaged in similar pursuits. 



The Barometer was made by Mr. John Newman of 

 Regent-street, and the greatest care was employed in its con- 

 struction. The internal diameter of the tube is 0.45 inch, 

 and the capacity of the cistern has been so adjusted, that a rise 

 or fall of 1 inch in the former, makes a difference of 0.0 1 inch 



* This was subsequently published in the Transactions, see Vol. vi. page 398. 

 VOL. VII. O 



