Harris Tweed standard definition became essential. Groups of merchants in both Lewis and Harris applied to the Board of Trade for a registered trade mark. When this trade mark, the Orb, was eventually granted, the Board insisted that it should be granted to all the islands of the Outer Hebrides i.e. to Lewis, North and South Uist, Benbecula and Barra, as well as to Harris, the rationale for this decision being that the tweed was made in exactly the same way in all those islands. In 1909, after much negotiation and a degree of acrimony from merchants in Harris who felt that
Donegal batholith Dalradian and the granodiorite. These early phases were followed by the emplacement of a large volume of porphyritic monzogranites at a time when the granodiorite and tonalite had cooled sufficiently to fracture. This pluton lies at the southwestern end of the Main Donegal granite. Three distinct types of granite are recognised, an outer biotite monzogranite inside which there is a body of biotite-muscovite monzogranite and in the centre is an aplitic biotite-muscovite microgranite. The intrusion is interpreted to have the form of a laccolith. The main part of the pluton shows only weak evidence of deformation. Studies of the anisotropy