The present watercolour is a diverting translation of the zodiacal rules into pictorial form. It shows which signs are related to which parts of the body: Ares (March) to the head, Taurus (April) to the neck, Gemini (May) to the arms and hands, Cancer (June) to the thorax, etc. In those months, one was ill-advised to apply medicines to the associated organs, though there might be countervailing arguments strong enough to overrule the implications of the zodiac.
In addition to their associations with given months and organs, the zodiacal signs also had ‘qualities’ which were also relevant: Taurus, Virgo and Capricorn had the qualities combining the hot and the dry, while Cancer, Scorpio and Pisces had the qualities combining the cold and the wet. Subtle minds would consider all the implications and associations of the zodiacal signs, while the unsubtle would use them as rules of thumb and follow them uncritically. It is notable that the sign Gemini is shown as conjoined (‘Siamese’) twins.