3 letters between I. R. Prentiss and Charles F., Sr., Prentiss in 1921 describing his idea for golf clubs weighted inversely according to length to ma Show more3 letters between I. R. Prentiss and Charles F., Sr., Prentiss in 1921 describing his idea for golf clubs weighted inversely according to length to make each club in a set hold the same balance, Brush in 1923 describing his 1886 patent on storage batteries, and Prentiss's response to Brush's letter in 1923. Charles F. Brush, Sr., Papers Series 1: Correspondence Subseries 3: Business and Professional (1876-1931) Box 5 Folder 12 Show less
