Each of the 2 smaller fermenting Vessels was furnished with a cylindric Tin-Tube; each Tube 4 Inches and a half Diameter, nailed on the Outside of a circular Opening in the Top or Head of each Vessel; communicating by additional rectangular Bends under the Funnel and Water in the Cistern: the great fermenting Vessel had 2 Tubes, each 4 Inches and a half Diameter; communicating with the Funnel. [Sidenote: Improvements suggested.] 340. The Process woud have been more complete, if the fermenting Vessels had been sunk till their Tops were even with the Ground: and plaistered round their Outsides with soft moist Clay, six Inches thick, to keep them Air-tight. Also, if the common Conductor had been only 1 Foot high: its horizontal or rectangular Arm only 6 Inches long: the Linen Trunk but 3 Feet, joining the Connecter on the Stillage 1 Foot high, to communicate with the Neck of the Balloon; which Neck shoud be 3 Yards in Length, and its circular Opening 1 Foot, at least in Diameter. CHAPTER LXVIII. [Sidenote: Inflation began about X. in the Morning.] Section 341. The Process of inflating the Balloon began about X. in the Morning, by pouring 4 Bottles of Vitriol, immediately one after the other, into the occasional Tub, properly placed over one of the smaller fermenting Vessels: the Tub being instantly rinced with a few Quarts of Water, which was suffered to fall into the same Vessel. The oblong Hole was left purposely open for a Minute, till the strong Smell of the Gass was perceived above the Orifice: i.e. till the Gass had pressed out all the common Air that remained floating over the Surface of the Mixture in the fermenting Vessel: which Smell being _plainly perceived_, the _solid_ Plug was immediately _driven_ down. And presently the Gass was known to press forward with an elastic Force throu’ the Tin Conductor, by the Motion it communicated to the Surface of the Water in the Cistern: thence upwards throu’ the common Conductor: at its Departure from both of which throu’ the Linen Trunk, and Neck into the Balloon, the Gass makes a guggling obtuse Sound by quick Intervals according to the Quantity of Gass protruded. And as the Intervals encreased, a Judgment was formed, that the Operation began to be less vigorous: and consequently that it became necessary, either to renew it by an Addition of more Vitriol and Water in the same Vessel, or to set the other small Vessel in Fermentation, the latter of which Mr. Lunardi preferred: this happened about half an Hour after the Vitriol was poured into the first Vessel. 342. After the second half Hour, eight Bottles were poured, by four at a Time, into the great Vessel. And at one o’Clock, the Balloon, without any farther Trouble was beautifully inflated.