with taffeta of the relevant faculty colour. In the case of masters (including Masters of Philosophy) the shell is of black corded rayon, for Doctors of Philosophy the shell is of maroon cloth, for Doctors of Engineering, Education and Medicine the shell is of crimson cloth, and for higher doctors (Doctors of Science, of Letters and of Law) the shell is of red cloth. The hood for Doctors of Clinical Psychology is, according to the Calendar, of black corded rayon, fully lined with royal blue and scarlet taffeta, but in practice the hood supplied and actually worn is scarlet lined (but not bound) with royal blue taffeta. Upon its introduction in 1985, the hood for the degree of Master of Engineering was in Aberdeen shape (as for the other master's degrees) however this was changed to Burgon shape in 1997 to bring it into line with the new four-year first degrees (MMath, etc.). Headwear Two types of hat are worn by graduates of the University: Bachelors, Masters, holders of foundation degrees, and Doctors in undress wear a black cloth mortarboard. Doctors in full dress wear a black Tudor bonnet with cord and tassels of the appropriate faculty colour. In the case of higher doctors (DSc, DLitt and LLD) the bonnet is of black velvet; for other doctors the bonnet is of black cloth. Doctors of Clinical Psychology have twisted cord and tassels of scarlet and royal blue; Doctors of Philosophy have red and green twisted cord and tassels. References Warwick University of Warwick