Published in 1926 with pictures whose copyright pre-dates 1917 and whose copyright has expired. An expired copyright means that you are free to use these photos in whatever capacity you wish, except you may not link to them at this site.
We might sum up all discipline by saying it means giving the appropriate reward for the conduct. When the conduct (including both attitudes and actions) is good, a positive reward is warranted. When the conduct is bad, a negative reward is in order. It’s really that simple.
John MacArthur
Garden-Flowers–1926-Robert-M-McCurdy