This text investigates the efficacy and application of capillary microscopy as a primary method for the direct observation and study of micro-organisms in their natural habitats. Boris Vasilʹevich Perfilʹev, a noted microbiologist, presents a rigorous framework for utilizing capillary glass tubes to capture and analyze microbial populations that are otherwise difficult to isolate or cultivate using traditional petri dish methods. The work argues that these capillary techniques provide a more accurate representation of ecological interactions and microbial morphology by minimizing environmental disruption.

Experts recognize this work as a foundational text for the development of in situ microbial ecology and direct observation techniques. Researchers frequently note the technical density of the prose, which serves as a specialized manual for those interested in the history of microbiological instrumentation.