[432] T´u Shu, section T´ao kung pu hui k´ao, fol. 10.

[433] O.C.A., p. 637.

[434] Made at Pilkington's Tile Works, Clifton Junction, by Manchester.

[435] See p. [202].

[436] T´u Shu, section entitled T´ao kung pu tsa lu, fol. 2 verso.

[437] On pp. [103] and [188].

[438] T´u Shu, section xxxii, T´ao kung pu hui k´ao, fol. 9.

[439] T´ao lu, bk. vii., fol. 10 verso.

[440] Quoted in the T´ao lu, bk. ix., fol. 2.

[441] Recorded in the T´ang Shu, the passage in question being quoted in the encyclopædia, T´u Shu, section xxxii, T´ao kung pu chi shih, fol. 1 verso.