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In a method of carbonating a beverage using a carbon dioxide diffusing stone, temperature is measured in a flow of that beverage immediately before the flow changes from laminar to effervescent, thereby obtaining a true temperature at which carbon dioxide is diffused into the beverage. In another as

In a method of carbonating a beverage using a carbon dioxide diffusing stone, temperature is measured in a flow of that beverage immediately before the flow changes from laminar to effervescent, thereby obtaining a true temperature at which carbon dioxide is diffused into the beverage. In another aspect of the present invention, there is provided a portable controller having connectors joinable to a gas pressure regulator of a gas cylinder and to any one of several beverage carbonation containers. The portable controller has instruments therein for controlling a flow of carbon dioxide gas to the beverage in any one of the containers and for controlling a pressure gradient of the carbon dioxide gas in the beverage over a period of time. There is also provided an elongated carbon dioxide diffusing stone assembly having an elongated temperature probe well extending parallel to and immediately below a diffusing stone.

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1. A method of carbonating a beverage, comprising the steps of: creating an upward laminar flow in said beverage;during a period of time, periodically forcing carbon dioxide gas bubbles into said beverage, in said upward laminar flow of said beverage, thereby changing said upward laminar flow to an

1. A method of carbonating a beverage, comprising the steps of: creating an upward laminar flow in said beverage;during a period of time, periodically forcing carbon dioxide gas bubbles into said beverage, in said upward laminar flow of said beverage, thereby changing said upward laminar flow to an effervescent flow;using said carbon dioxide gas, applying a pressure gradient on said beverage during said period of time;measuring a temperature of said beverage immediately before said upward laminar flow changes to said effervescent flow, andadjusting said pressure gradient according to a pressure/temperature ratio dependent on said temperature. 2. The method as claimed in claim 1, wherein said steps of measuring a temperature and adjusting said pressure gradient are repeated periodically. 3. The method as claimed in claim 1 wherein said beverage is contained in a container and said step of changing said upward laminar flow to an effervescent flow is effected in a central lower portion of said container. 4. The method as claimed in claim 2, wherein said step of measuring a temperature is effected with a precision of 0.1° C. (0.18° F.). 5. The method as claimed in claim 1, further including the step of maintaining a majority of said carbon dioxide gas bubbles in suspension in said beverage. 6. The method as claimed in claim 3, wherein said step of adjusting said pressure gradient is effected by one of the following steps: momentarily interrupting said step of periodically forcing carbon dioxide gas bubbles into said beverage;venting a portion of said carbon dioxide gas outside said container; andventing a portion of said carbon dioxide gas outside said container and forcing said portion of said carbon dioxide gas back into said beverage. 7. The method as claimed in claim 1, wherein said steps of applying a pressure gradient and adjusting said pressure gradient are effected at a pressure of less than 15 psi. 8. The method as claimed in claim 1, further including the step of selecting a maximum flow of said carbon dioxide gas bubbles in said step of periodically forcing carbon dioxide gas bubbles into said beverage. 9. The method as claimed in claim 8, wherein said step of selecting a maximum flow comprises the step of: forcing said carbon dioxide gas through a carbonation stone and selecting said maximum flow of said gas bubbles when said gas bubbles exit said stone and form an uniform layer of bubbles with an uniform density, from an entire surface of said stone. 10. The method as claimed in claim 3, further comprising the steps of increasing a carbon dioxide gas pressure inside said container and emptying said container by force of said carbon dioxide gas pressure.