Haemoglobin scale : effective ferrotherapy / [A/S Serpens (Copenhagen) ; sole distributing agent, U.K. & Dominions, Coates & Cooper, Ltd.].

[London] : [Coates & Cooper], [1935]

12 unnumbered pages : illustrations (part color) ; 12 x 16 cm

Cover title.

Booklet advertising Idozan, a "colloidal iron solution, neutral, and containing 5 per cent of pure iron (Fe)."

Also includes tabs of filter paper to be used to absorb samples ofblood and read against a printed "haemoglobin scale" in different shades of red giving readings from 10% to 100%.