ADDENDA. 



Page 147, § 394. 



Another fact has been developed which tends to confirm what 

 has been said about the crossing of the air in the calm belts. 

 Schonbein, a few years ago, discovered ozone in the atmosphere, 

 and since that, though chemists are not agreed as to what the new 

 substance is — if it be a new substance — or how or where, in the 

 laboratories of nature, it is generated, it has been used by me- 

 teorologists as an implement or means for carrying on their ob- 

 servations. Schonbein and some of the French philosophers, as 

 Bineau, hold that the blue of the sky is due to the presence of 

 ozone in the atmosphere. 



Among other experiments, observations have been made to de- 

 termine the presence and quantity of ozone in the winds from dif- 

 ferent quarters and in different latitudes. For this purpose, my 

 friend Jansen, of the Dutch navy, made a series of observations 

 with ozone paper all the way from England to Australia. He was 

 on board the " Eoyal Charter" last spring, when she made the un- 

 precedented run of 59 1 days to Australia. His observations were 

 made on board that vessel, and, in giving me an account of the 

 voyage on his arrival at Melbourne, he says : 



" I forgot to mention my observations with ozone paper. They 

 have been very interesting. I found, as far as I could make de- 

 ductions from a single set of carefully-made observations, that the 

 ozone is manufactured between the tropics. I invariably found 

 the ozone most abundant in the winds that bloAV north and south 

 of the trades from the equator. In the winds from the pole there 

 was but little ozone." 



While he was writing this from the antipodes. Dr. Moffat was 

 reporting, in a paper before the Meteorological Society of London, 

 the results of observations in England made by himself, and which 



