136 



Those readings, it must be observed, are not reduced to sea- 

 level, but they are corrected for temperature, index-error, and 

 capillarity. 



Assuming the late ITr, Lawson's estimate of the mean rain- 

 fall for Hereford to be correct (27" 145 inches) we are this year 

 about 7 inches short of our average supply ; the amount measured 

 being only 20*146 inches. 



Observations vrith the dry and wet bulb thermometera 

 were not commenced until February, and this registration being 

 necessarily imperfect, the results are not included in the table for 

 the year ; but I have made up a table shewing the degree of 

 humidity for each day of the month from April to August, to- 

 gether with the raiu-fall. 



Ozone registration was commenced much later in the year, 

 and several places were tried before a satisfactory spot could be 

 found. Scarcely a trace of ozone could be discovered in the 

 Hereford atmosphere, but at last the Ozonometer was placed on 

 Eign Hill, with very satisfactory results. In commencing this 

 class of observations, I have had the advantage of Br. Kemp's 

 advice and assistance. The Doctor found the Bartonsham a better 

 station for ozone oberservations than the City, but Eign Hill — 

 already mentioned — has proved infinitely superior to either. 



Correct records of the velocity and pressure of the wind are 

 very desirable, and in a practicable point of view, second to none 

 in importance. "We have at present no wind-gauge in Hereford 

 which can be depended upon ; a fact much to be regretted ; I 

 therefore strongly recommend the setting up of a Eobinson's 

 Anemometer, and feel assured that the Governors of the Infirmary 

 would readily admit such an apparatus to be placed on the roof 

 of that building. A better situation coulJ not be desired. 



EDWI^ J. ISBELL. 



