Boxed set of phenol red "Capillators", pH range 6.8 to 8.4, made by the British Drug Houses, Poole, Dorset, 1965 Boxed set of phenol red "Capillators" 1965
Boxed set of thymol blue "Capillators", pH range 8.0 to 9.6, with dye missing, made by the British Drug Houses Ltd., London, 1952 Boxed set of thymol blue "Capillators" 1952
Boxed set of phenol red "Capillators", pH range 6.8 to 8.4, with dye missing, made by the British Drug Houses Ltd., London, c. 1950 Boxed set of phenol red "Capillators" 1950
The B.D.H. Capillator, dated 5 March 1959. 4 cards, range pH4-pH11 with three rubber teats, but no capillaries (tubes) The B.D.H. Capillator 1900-1980
Boxed set of bromo-thymol blue "Capillators", pH range 6.0 to 7.6, with dye missing, made by the British Drug Houses Ltd., London, 1952 Boxed set of bromo-thymol blue "Capillators" 1952
Phenol red "Capillators" with pH range of 6.8 to 8.4 in paper packet, made by the British Drug Houses Ltd., London, 1944 Phenol red "Capillators" with pH range of 6.8 to 8.4 in paper packet 1944
Bromo thymol blue "Capillators" with pH range of 6.0 to 7.6 in paper packet, made by the British Drug Houses Ltd., London, 1942 Bromo thymol blue "Capillators" with pH range of 6.0 to 7.6 in paper packet 1942
"Capillator" with a methyl red dye, pH 4.4-6.0, made by the British Drug Houses Ltd., Poole, England, 1969 "Capillator" with a methyl red dye 1969