# Title: Guinea pig litter sizes for two strains # 1: Year # 2: Strain B # 3: Strain 13 # 1916, 2.68, 2.36 1917, 2.60, 2.41 1918, 2.43, 2.39 1919, 2.90, 2.85 1920, 2.94, 2.82 1921, 2.70, 2.73 1922, 2.68, 2.58 1923, 2.98, 2.89 1924, 2.85, 2.78