15:37:17
There are approbations in each section. The approbations in the responsa volume are the same as those in the sermon volume They were written by: R. Sholom Elhanan Ha-levi Yaffe of New York, R. Dov Aryeh (son of Avraham) Ha-Kohen Leventhal of Philadelphia, R. Hayyim Yaakov Vidrowitz of New York, and R. Hillel Ha-Kohen, who was known as Dr.Klein of New York.