The intensified activity of magnetic regions on the Sun during the mini mum periods of solar cycles has a pronounced influence on the blood system. Since our data on the ultraviolet and corpuscular indexes are in adequate thus far, any comparison with them should be made with great caution.
Bazrukova's hypothesis that different solar indexes are representative during the various phases of the 11-year cycle has been confirmed by our findings.
Unfortunately we cannot apply G. Piccardi's method under our clinical conditions since we deal with the human organism rather than colloid solutions. At this stage in our study of the problem we are limited to the statistical method alone, which is not less accurate than the experimental method when all conditions required for a valid solution of the problem are met as in experimental work.
Primary attention should be paid to the selection of the object of obser vation, which is sometimes rather difficult. We have excluded children and old people from our survey because their blood profiles reflect age characteristics which are subject to significant fluctuations.
A correct analysis of the experimental data should take into account all factors that might affect the process under investigation. Thus, we were
frequently compelled to discontinue our observations because of changes in the blood profile induced by the onset of epidemics, such as influenza, which causes leukopenia and relative lymphocytosis, etc.
In addition to the accuracy of calculations, the statistical techniques must be correctly applied in order to prevent erroneous interpretation of the experimental data.
Random sampling was generally adopted in order to minimize prejudice and subjective factors.
Unfortunately, these elementary requirements are not always met and frequently masses of data must remain unprocessed solely because the necessary statistical conditions have not been fulfilled.
Hence, caution and thoroughness are evidently required in order to determine the influence of solar activity on the human organism, for only sound and lucid statistical analyses may prevent errors in the correlating of certain human physiological and pathological processes with variations of solar activity.