Hello Matthew et al, There is no question that the bubbling introduces Oxygen and Carbon Dioxide into the water. The CO2 becomes, in solution, carbonic acid. Small changes in the pH of the solution affect the behavior of the sol. The presence of oxygen provides an opportunity compounds to form, quite possibly with Nitrogen, to create another acid and with monatomic silver ions to form oxygen compounds. Any one of these will affect conductivity, yield, and probably particle size, and behavior after generation. Your observation of varying Tyndall effect with bubbling is probably due to these influences interacting with one another and with with who-knows-what-else, probably including the moon-phase. I have noted small increase in the conductivity of water from standing open in a 1/2 gallon beaker for an hour or so at room temperature, covered with a loose lid (dinner plate), without bubbling, measured with a temperature compensated instrument. I attribute this primarily to the CO2. I do not have the instrumentation to measure CO2 and O2 concentrations but it very probably increases significantly with bubbling. Frank Key, et al, can very probably offer detailed data on this. JOH
-----Original Message----- From: Matthew McCann PE [mailto:mmcc...@franciscan.edu] Sent: Tuesday, November 18, 2003 2:21 PM To: silver-list@eskimo.com Subject: CS>CS recap: light,coloured bottles, plastic bottles, electrical fields, aeration devices Hi, Rowena, Others have a lot more experience with CS generation than I do, but I would like to make a remark about air-bubbler mixing. I have reason to think that the bubbler method can produce a spurious Tyndall Effect. I would not use it anymore. Best regards, Matthew
