Catgut

( Manf.) A string prepared from the intestines of sheep for musical instruments, bow-strings, hatters' bow-strings, clock-makers' cords, and thongs for whips and laces for boots. The intestines are first cleansed and freed from fatty matter, and the external membrane removed. They are then soaked, and the inner membrane is taken away, after which they are soaked in a solution of potash. They are next drawn through a plate perforated with holes, fumigated with sulphur, and sorted according to size. The strings known as "Roman strings" are the best for violins. They are made at Milan, and are distinguished for their strength and transparency. They are generally formed of two separate pieces twisted together; and great nicety is nece ary in conducting the proce of fumigation to which they are subjected, lest they become too brittle if exposed for too long a time to the action of the sulphur, or liable to be frequently out of tune if not exposed long enough. Larger strings are made by twisting several lengths of catgut together until the required thickne is obtained. The intestines of other animals have been used for making a coarse but strong cord for turning lathes and machinery; but those of the sheep only have been found suitable for the above purposes. C. is also much used in surgery for suturing wounds, as it will generally be absorbed and removed by the regular proce es of Nature.