In the book he defined three different furniture types: type-needs, type-furniture, and human-limb objects.
He defined human-limb objects as: "Extensions of our limbs and adapted to human functions that are type-needs and type-functions, therefore type-objects and type-furniture.
And long live the good taste manifested by choice, subtlety, proportion, and harmony".
The first results of the collaboration were three chrome-plated tubular steel chairs designed for two of his projects, The Maison la Roche in Paris and a pavilion for Barbara and Henry Church.
The line of furniture was expanded for Le Corbusier's 1929 Salon d'Automne installation, 'Equipment for the Home'.