The annual average increase of the denomination has been as follows:
| Ministers. | Churches. | Members. | |
| In 25 years | 1⅓ | ¾ | 41 |
22. There is a denomination of German Baptists which has assumed for itself the name of "Brethren," but they are commonly called "Dunkers" or "Tunkers" to distinguish them from the Mennonists. They have also been called "Tumblers" from the manner in which they perform baptism, which is by putting the person head forward under water (while kneeling), so as to resemble the motion of the body in the act of tumbling.
In 1843, their larger congregations contained from two to three hundred members; but little was then known among themselves of their numbers. Their subsequent statistics have been as follows:
| Ministers. | Churches. | Members. | |
| 1859 | 150 | 160 | 8,700 |
| 1862 | — | — | 8,200 |
| 1863 | 100 | 200 | 20,000 |
| 1866 | 150 | 200 | 20,000 |
| 1867 | — | — | 20,000 |
A membership of 20,000 has been stated for this denomination during the last half-dozen years without increase or diminution.
23. The "German Seventh-Day Baptists" first made their appearance in Germany in 1694. From these, after their organization in the United States, sprang the Seventh-Day branch. Their numbers in 1860 were estimated at:
| Ministers. | Members. | |
| 1860 | 187 | 1,800 |
24. A society designated as "Free-Communion Baptists" arose in 1858 in McDonough Co., Illinois, and organized a quarterly meeting conference. At the quarterly meeting in 1859, one preacher, four licentiates, a few small churches, and 104 members were reported.
25. The "Old School," or Anti-mission, Baptists were formerly a portion of the regular Baptists, above-mentioned. They are opposed to the academical or theological education of their ministers, and to Bible, missionary, and all other voluntary societies of like nature.