It has been rather generally accepted that the urine of normal infants often contains a small number of organisms that cannot definitely be excluded as contaminations. The work of Ross,1 Beeler and Helmholz,2 Kleinschmidt,3 and others substantiates this view. Recently the entire question was reopened by Langer and Soldin4 who claim that all former work in which liquid mediums had not been used for the isolation of bacteria is open to criticism. In a series of 138 cases they isolated Streptococcus lacticus 128 times, Bacillus coli sixteen times, and Bacillus lactis aerogenes four times; Bacillus coli was associated with Streptococcus lacticus six times. Occasionally, a single examination revealed sterile urine, but on repetition bacteria were found. At that no account is taken of anaerobic bacteria.
Langer and Soldin speak only of washing the urethra thoroughly with a 10 per cent, boric acid solution. The solvent for