Identifications of Centennial Calendar Images: July 2011
Images in A Century of Variable Star Observing: 1911-2010
July 2011: AAVSO charts
a) T Her finder chart distributed by William Tyler Olcott 1911;
b) SS Cyg field photo with sequence stars marked and measured;
c) S Vir chart with lettered sequence and measured values;
d) S Vir blueprint standard chart 1912;