The baptism records of the Readington Reformed Church were published in the Somerset County Historical Quarterly beginning with volume 4, number 2, in April 1915. They continue through volume 5 (1916), volume 6, nos. 1, 3 and 4 (1917), volume 7, nos. 2, 3 and 4 (1918), and end with volume 8, nos. 1 and 2 (1919). The Somerset County Historical Quarterly ceased publication with volume 8 in 1919. The baptisms start in 1720 and end in 1837.
The Readington Reformed Church was originally known as "The Church over the North Branch," or the "North Branch Reformed Dutch Church," and was first organized in 1717 or 1718. The first pastor was Rev. Theodorus Frelinghuysen. During the course of its history there have been several buildings that were used by the congregation, not all of them at the same physical location. The current church is in Readington Township in Hunterdon County, New Jersey. There is a church cemetery and about 2300 interments are posted at the Find-A-Grave website.
I have a PDF of scanned pages from volume 4 (1915) which covers the years 1720 to 1752.
Readington Reformed Church Baptisms, SCHQ v. 4 (1915)
It is recommended that you download the file.