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important to use pure starch, because common starcli contains impurities which 

 will vitiate the test and lead to wrong conclusions. The starch should be mixed 

 in the usual manner ; then the iodide of potassium must be dissolved in a small 

 quantity of water and mixed thoroughly with the starch ; then the two must be 

 boiled together for a minute, an operation which requii'cs some care ; then the 

 paper is to be immersed in the mixture for at least five minutes, taken out, 

 dried, and bottled. Scorched paper must be rejected. 



Whatever ozone may turn out to be, it is certain that it is difficult to 

 discover its presence in the neighbourhoods of dunghills, foul drains, or cesspools. 

 In the streets of large cities it is, I believe, never detected. We may therefore in 

 a measure regard the ozone's test as a test of the purity of the air we are 

 breathing, and with this view I had, during the past year, foiur small boxes made, 

 something like dark lanterns, and set up in different parts of the city of Hereford 

 in order to test the comparative condition of the atmosphere of the place in four 

 situations tolerably distant from each other. 



These four situations were as follows : — Richmond-place, the Blue School 

 play-ground. High-town, and St. Peter's School play -ground. 



Of the stations named above, Richmond-place stood first in capability of 

 manifesting the presence of ozone, Blue School play-ground took the second 

 place. High-town the third, St. Peter's play-ground the fourth. But Richmond- 

 place and the Blue School would at no time bear comparison with the open 

 country. I have an ozonometer in Mr. Davison's nursery garden, near the White 

 Cross, and tlfere the papers will occasionally indicate an amount of ozone far 

 beyond the maximum of the standard scale. I cannot, however, attend to these 

 observations myself, and as my friends who do attend to them are sometimes 

 absent from home, I am unable to present the Club with any satisfactory records 

 of work done at this station. 



The only remarkable storms I find recorded during 1867 occurred as 

 follows : — January 7th, 8th, 9th, heavy rain, with a strong gale on the night of 

 7th-8th. The great depression of the barometer on the morning of the 8th has 

 been already noticed. 



February 5th-6th, a strong gale during the night. 



March 12th, 13th, 14th, much snow ; also on the l8th, 19th, 22nd ; then a 

 thaw on the 23rd, and heavy rain followed by a great rise of the river and floods 

 on the White Cross Road, at the Barton Station, and at Widemarsh. From the 

 25th to the 31st the road at Widemarsh was impassable for foot passengers. 



April 14th, 15th, 16th, weather very stormy ; squalls rising at times to 

 strong gales. 



May 13th, 21st, 26th, large amount of rainfall measured on the mornings 

 of each of these days, especially on the 21st. 



July 13th to 18th, hard squalls with much rain. The latter sufficient to 

 raise the amoimt for the month very much above the average. 



August 20th, a thunder-storm, with heavy rain. 



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