A brief attempt was made to switch to a bimonthly schedule in 1943; a March and May issue appeared, but the next issue was titled Fall 1943, inaugurating another quarterly period. The Fall 1950 issue was followed by November 1950, and this began a bimonthly period that lasted until May 1954, which was followed by a Summer 1954 issue. A quarterly schedule resumed until the end; unusually, the winter issue that year was dated Winter 1954/55, rather than with a single year.[9] The volume numbering was consistent throughout the magazine's publication, with five volumes of 12 issues and a final volume of 11, but there were three errors in the volume numbering printed on the spine (though not on the masthead): issue 5/10 was given as 5/8 on the spine; issue 5/11 was given as 6/3 on the spine; and issue 6/11 was given as 6/12 on the spine.[25]