The duck-rabbit, an ambiguous drawing introduced by the Gestalt psychologist Jastrow, was used by the philosopher Ludwig Wittgenstein to illustrate his account of perception and 'seeing as': the figure can be seen as a duck or as a rabbit, though the figure itself does not change.
Adapted from The Household Physician: a twentieth century medica. A practical description in plain language of all the diseases of men, women and children with latest discoveries in medicine and most approved methods of treatment (1905). Printed on acid free paper.Measurements: 17 cm x 12...
The six pencils in this set all feature really un-motivational messages such as 'False hope is better than no hope'. All rather entertaining if not not very productive... 6 HB pencils in a themed box.Pack measures 19 x 6 x 1.5 cm.
The pencil is a wonderful thing, needed by everyone at some point (and needed always by some of us), but these ones have forgotten: "I'm easily broken," "In time I'll be pointless," "You're going to write me off" and more. Find a place in your...
A very different kind of colour theory, from the Theosophists. This chart showing the spiritual and mental 'meanings' of colour is adapted from Thought-Forms by Annie Besant and C.W. Leadbeater (1905) Printed on acid free paper.Measurements: 17 cm x 12 cm.Comes with 120gsm recycled envelope.Blank...