By maintaining the contact with the electrostatic generator, the battery continues to charge as does the tube; when the charge accumulated in the tube and the tension between its plates once again reach the critical point, the spark bridges the gap again, the tube is discharged and the process continues until the desired charge has been supplied to the battery of Leyden jars.
The critical tension depends exclusively on the distance, on the state of conservation of the two small balls and the physical conditions of the air; if all remains unmiscellaneousd, the charge transferred from the electrostatic generator with each spark is the same, and the total charge accumulated in the battery will be the same as so many times the critical charge as the number of sparks that bridge the gap during the charging process.
The model presented here differs from the traditional ones we have described in that the tube, instead of being vertical, is horizontal and no direct connection is provided between the external plate of the tube and the mobile sphere of the gap.