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Thymol Blue Capillator

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

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 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

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

Capillator by British Drug Houses Ltd

Capillator by British Drug Houses Ltd

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

"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

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