There is definate a trend with end-time predictions ...
Miller predicted the end in 1844 - it doesn't come and there is dissapointment - Miller loses zeal for end-time prophecies
Barbour, a Millerite, recalculates and suggests a new date of 1874 with a rapture at 1878 - it doesn't come to pass and there is dissapointment. Barbour loses interest end-time calculations.
Russell, an associate of Barbour, recalculates and suggests 1914 as the new date of the rapture and end - it doesn't come to pass and there is great dissapointment. Russell dies.
Rutherford, a student of Russell, recalculates and suggests 1925 as the new date of the end - it doesn't come to pass and there is great dissapointment. Rutherford dies.
Franz, a junior associate of Rutherford, recalculates and suggests 1975-76 as the new date of the end ...