#18 - large amount of employees. They would have an employees banquet every May. They would come over to the office from all of the locations and would have a picture taken. That is likely what this is. Front middle Marie Wolgelmuth.
#3 - from R to L, William "Bill" Weldon (far right) chauffer housekeeper, Leroy Tendil, Walter Greiner, ??, William "Bill" Shaffer (oldest employee), Clarence Schock
#4 - Clarence Schock on bottom left front, Walter Griner, Bill Schaffer, back from R to L, William Leroy Tyndall, Unknown, Schock's Housekeeper N. Shaffer