Abstract
For commemoration of 50th anniversary of foundation of this journal, an article of historical interest, and of general importance is reprinted in the present volume accompanied by current editorial notes. On 6 June 1955 an article was submitted for publication by Gyula Takátsy M.D., senior virologist at State Institute of Public Health, Budapest, initiating a new era - the era of microtechniques - in microbiology and other fields of natural science. The article with reference 1955, 3: 191-202 together with current editorial notes appear below

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