Clifton College Scientific Society, 83 



sation, making respiration difficult by acting powerfully upon 

 tlie mucous membrane, and producing catarrhal eifects. 



It bleaches powerfully by oxidizing the colouring matter 

 submitted to its action. This property can easily be shown 

 experimentally by suspending in a jar of ozone some litmus, 

 turmeric, indigo, or any vegetable colour, when it will be 

 destroyed. Indigo (CgHjNO) is converted into isatine 

 (CgHgNOg) ; in the same way a rose or other flower is ren- 

 dered colourless when brought under its influence. Mr. 

 Edward Beanes has patented the application of ozone in the 

 bleaching of syrup for the manufacture of sugar. 



Combustion would doubtless take place in ozone, with 

 great brilliancy could we obtain it pure from admixture 

 with foreign gases, judging from the extraordinary oxi- 

 dizing property it possesses. Gold, silver, iron, copper, 

 zinc, cadmium, tin, lead, bismuth, &c,, are, when moistened, 

 carried to the state of peroxide or highest state of oxidation, 

 by the action of ozone : according to Schonbein, this is 

 accomj)anied by the disengagement of minute quantities of 

 peroxide of hydrogen (HjOj. If the metals are dry, little or 

 no effect is produced with the exception of mercury. Dry 

 iodine also is oxidized by ozone. Ozone is quite insoluble in 

 water, acids, or alkalies ; but it is readily absorbed by a solu- 

 tion of potassic iodide (KI). Thus, if a tube of pure oxygen 

 is inverted over a solution of potassic iodide (KI), and the 

 gas subjected to a continual discharge of electricity, it will be 

 entirely absorbed, potassic hydrate and iodine being formed : 

 4ia + e, + 2H20 = 4KHO + 2I2 



This again reacts upon the water when potassic iodate (KIO3), 

 peroxide of hydrogen (HgOg), and peroxide of potassium 

 (K2O4) are foi^med. 



Ozone oxidizes ammonia, with the formation of amnionic 

 nitrate. Thus — 



2NH3 + e3 = NH^N0j + H^O. 



Ozonized air oxidizes lime water (CaHgOa) to the nitrate 

 (Ca2N03) . It is powerfully electromotive, and is adiathermic, 

 although oxygen is diathermic. 



Dr. Emerson Reynolds has lately discovered that ozone 

 entirely obliterates the latent image in photography, so 

 much so that another image can be developed on the same 

 plate vpithout any change being necessary. He also thinks 

 that this is the primary cause of the length of time necessary 

 on some days for the production of a successful photograph. 

 It is an interesting fact, since it proves that the production 



