4. To charge the Water, using one Generator and two Cylinders. -"Having charged the generator and filled the cylinders as previously directed, and securely closed all valves, bungs and connections, proceed to charge the water in the first cylinder. Open the inlet cock on first cylinder. Give the vitriol valve on the generator one-half turn to the left; let it remain in that position from twelve to fifteen seconds, or until the pressure gauge indicates about ten pounds, then close it firmly, but not with too much force. Turn the agitator slowly until the indicator hand of the pressure gauge remains at a fixed point, which shows that the amount of vitriol let down has been exhausted, and made all the gas it is capable of. If the desired pressure (40 to 60 lbs., for bottling) has not been obtained, a little more acid should be let down and the opera-tion repeated. The cylinder agitator should now be turned briskly; this will cause the water to absorb the gas and lessen the pressure in the generator. More gas must now be generated, by repeating the operation of letting down acid and agitating the contents of the generator. When the water in the cylinder has been thoroughly agitated, and will absorb no more gas, and the pressure gauge indicates the desired pressure, the water in the cylinder is charged, and the outlet cock may be opened, to allow the charged water to pass to the bottling table. As the water is drawn off from the cylinder, the pressure should be maintained by occasionally generating more gas, and allowing it to pass into the cylinder. When the water in the first cylinder has been exhausted, the inlet cock on the first cylinder should be closed, and the outlet cock on the second cylinder opened, so that the gas remaining in the first cylinder may pass over into the second. Turn the agitator of the second cylinder briskly for ten minutes or so, to enable the water to absorb as much as possible of the gas from the first cylinder. Close the outlet cocks of both cylinders, and open the inlet cock of the second cylinder. Proceed to charge the water in the second cylinder, as directed for the first cylinder. While the charged water in the second cylinder is being used, the first cylinder may be prepared for charging a second time. Start the clamp on the filling plug and remove the cap to allow the gas to escape. Refill the cylinder three-fourths full, return the cap and clamp and screw down securely. It is well to ascertain before starting the clamp that the inlet cock is tightly closed. After the water is exhausted from the second cylinder, close the inlet cock and open the outlet cock on the first cylinder, to allow the gas remaining in the second cylinder to pass into the first cylinder. Agitate the contents of the first fountain for about ten minutes. Close both cylinder outlet cocks, and open the inlet cock of the first cylinder, to allow gas from the generator to pass over and completely charge the water. Refill the second cylinder with water and proceed as directed until the contents of the generator are exhausted. When the charge in the generator is exhausted, fill the empty cylinder two-thirds full of water, and allow the gas remaining in the generator to pass into it, reducing the pressure as much as possible by agitating the water. When the charge in the generator is exhausted, start the cap on the generator filling bung and allow the gas to escape slowly until the pressure gauge indicates ten to fifteen pounds. Then open the blow-off cock gradually and allow the exhausted material to escape, turning the agitator constantly meanwhile. Never blow off the generator suddenly, as there is danger of collapsing the lining. When the gauge indicates that the pressure is gone, and while the exhausted charge is escaping, remove the cap from the filling bung and pour water into the generator body, turning the agitator constantly to facilitate the cleansing of the generator. The acid chamber should be thoroughly cleansed by pouring water through the filling bung, and discharging into the generator body by opening the vitriol valve. The generator should be thoroughly cleansed after each charge, as material allowed to remain will become hard and difficult to remove, and if allowed to accumulate will eventually interfere with working the generator. The contents of the purifiers will generally be discharged by syphoning over into the generator body when the charge is blown off, but in all cases the purifier blow-off cocks should be opened, and whatever water remains discharged, and the purifiers refilled before recharging.

5. To charge the Water, using one Generator and three Cylinders. - "Having charged the generator and filled the cylinders as previously directed, and securely closed all valves, bungs and connections, proceed to charge the water in the first cylinder. Open the inlet cock on the first cylinder. Give the vitriol valve on the generator one-half turn to the left; let it remain in that position from twelve to fifteen seconds, or until the pressure gauge indicates about ten pounds; then close it firmly, but not with too much force. Turn the agitator slowly until the indicator hand of pressure gauge remains at a fixed point, which shows that the amount of vitriol let down has been exhausted and made all the gas it is capable of. If the desired pressure (40 to 60 lbs., for bottling) has not been obtained, a little more acid should be let down and the operation repeated. The cylinder agitator should now be turned briskly; this will cause the water to absorb the gas and lessen the pressure in the generator. More gas must now be generated by repeating the operation of letting down acid and agitating the contents of the generator. When the water in the cylinder has been thoroughly agitated and will absorb no more gas, and the pressure gauge indicates the desired pressure, the water in the cylinder is charged. The inlet cock should now be closed, and the outlet cock may be opened to allow the charged water to pass to the bottling table. As the water is drawn off from the cylinder, the pressure should be maintained by occasionally allowing more gas to pass from the generator into the cylinder. The water in the second cylinder should be charged while that in the first cylinder is being used, by repeating the operation as directed for charging the first cylinder. When the water is exhausted from the first cylinder the third cylinder should be partially charged, by opening its outlet cock and allowing the gas from the first cylinder to pass over into the third cylinder, first closing the outlet ccok of the second cylinder. Agitate the water in the third cylinder briskly for ten minutes, to enable the water to absorb as much as possible of the gas in the first cylinder. Then close the outlet cocks on both the first and third cylinders and open the inlet cock on the third cylinder, to allow gas to pass over from the generator and complete the charging of the water. To charge the first cylinder the second time, start the clamp on filling bung, and remove the cap to allow the gas to escape. When the gas has escaped, remove the clamp and cap and fill the cylinder two-thirds full of water. When the water in the second cylinder is exhausted, equalize the gas into the first cylinder and proceed as directed for the third cylinder. Continue to repeat this operation until the contents of the generator are exhausted, equalizing the gas from the empty cylinder into the one to be charged, each time, so as to economize it as much as possible.

"When the charge in the generator is exhausted, fill the empty cylinders two-thirds full of water, and allow the gas remaining in the generator to pass into them, reducing the pressure as much as possible, by agitating the water. Close the inlet cocks on all cylinders, and start the clamp on the generator filling bung, allowing the gas to escape slowly until the pressure is reduced to ten or fifteen pounds. Open the blow-off cock gradually and allow the spent charge to escape, turning the agitator constantly meanwhile. Never blow off the generator suddenly, as there is danger of collapsing the lining. When the gauge indicates that the pressure is gone, and while the exhausted charge is escaping, remove the cap from the filling bung and pour water into the generator body, turning the agitator constantly to facilitate the cleaning of the generator. The acid chamber should be thoroughly cleansed by filling with water through the filling bung, and discharging into the generator body by opening the vitriol valve. The generator should be thoroughly cleansed after each charge, as material allowed to remain will become hard and difficult to remove, and if allowed to accumulate will eventually interfere with working the generator. When the charge is blown off, the contents of the purifiers will generally be discharged by syphoning over into the generator body; but in all cases the purifier blow-off cocks should be opened, and whatever remains discharged, and the purifiers refilled before recharging".