“化学世界”自本年一月份即八卷一期起增辟“中国化工文摘”一栏後,多数读者认为对於化学研究工作增加不少便利。但以这种文摘仅自一九五○年起,而一九五○年以前的文献为数甚多,本刊篇幅有限,无法按期刊出,因而决定另出专辑。现在为配合读者的需要和要求,我们将1921年至1949年的文献摘要,合并在这一期内刊出,所以我们计划的 Since ChemChina added a new column entitled “China Chemical Abstracts” since January this year, ie eight volumes, a majority of readers think it is more convenient for chemical research. However, this digest has only been published since 1950, but there was a large number of articles before 1950. Due to the limited length of the issue, it was not available for publication on a regular basis and the album was decided upon. Now in line with the needs and requirements of readers, we summarize the literature from 1921 to 1949 and publish them in this issue, so we plan