The magnetic properties of the windblown loess units and interbedded palaeosols of the famous Chinese Loess Plateau provide key palaeo-precipitation data for this populous, monsoon-dominated region.
The loess/palaeosol sediments record rainfall totals, directly complementing the oxygen isotope records of Chinese speleothems.
Many dated examples between 19 exist, and occasional examples dated between 19 have also been noted although B.8 was more generally used in those years (with the words MADE IN ENGLAND at the bottom of the mark in place of the single word ENGLAND).
Many pieces fortunately carry in addition to trade-mark and pattern number an impressed or printed indication of when they were made. The printed dates are usually indicated by Code Numbers beginning with and up to .
A simple way of calculating the date is to add the number in question to 1927.
1886 to mark the appointment of Henry Doulton as 'Potter to H. A simplified version showing only the coronet on a flat base and the word DOULTON was also used.
The coronet was probably added to the earlier mark c. The Prince of Wales' (later King Edward VI 1), ENGLAND was added underneath after 1891. It appears to have been used instead of B.3 especially on bone china products and on the more expensive earthen wares.
It was in use for all Fine Bone China products between 19 and is still used today on figures, animal models and other non-tableware Bone China products. piece with B.7 for example, will have been made before 1927 and probably before 1922.