the exchange between gold standards. The movement for its production for the 564 work performed during the years 1921-4 was (in kgm.) :— 1924 1923 1922 Gold 24,647 24,162 23,276 Silver . Ag 47 107880 Sodium (Natrium) Na II 22-097 Strontium Sr 38 87:63 Sulphur S 16 32-064 Tantalum Ta 73 181-5 Tellurium Te 52 127:5 Terbium Tb 65 159-2 Thallium Ti SI 204°39 Thorium Th go 232-15 Thulium Tm 69 169-4 Tin Sn 50 118-70 Titanium . ; 10,000 ag 10,000 Czechoslovakia . 61,974 | 29,906 g1,880 Estonia T 13,999 13,999 Finland ts 8,282 8,2582 France . . 1823 SEVENTH EDITION . . IS 200,000 . . | I 1,90.},000,000 3,306,000,000