155 
Monday, November 15, pool freshly filled....... Be ec TSO None 
EVM ee UCT AUIS Ca rsucten ste eke tetorsad es neve chekons slcusiel erat 23.100 Present 
Pool dosed with GSO grams chloride lime. 
TESA aya NOVEMDET! Ge ale ells as els eerie wists = eicce) o's at ee 26 None 
HM VeNIN ee Faire TelIS@s Wace tte > nereteheciceosuce spe aeeles < 12,000 Present 
Pool dosed with chloride of lime. 
PVECHES@ AV: ian M:,) INOVEMDOCI II 5 cl. jcc tee te cmeus cles 14 None 
Pvening, after use (no sample). 
Pool dosed with chloride of lime. 
Thursday a. m., November 18, water had not been 
changed as was usually done............... 9 None 
Evening, after use (no sample). 
Pool not dosed. 
FDTE Calverley IN NOVEM CTS: IO acs aeyewnciscrs colo cre ecnveierarea sais 11,200 Present 
Hivieniimnes SaiulerantS@ae, .. cy cccers: sche cious. o aie isistneiere aueirs laste 20,500 Present 
Dosed with chloride of lime. 
SS ta L NS CAE eNGOV INTE) ETS tees es raures oye Avae akete ishusgia eeestaeey ens. co eRecenenc 1s None 
Ivening (10 sample). 
A study of the results shown on this table indicates that the effect of 
the chloride of lime treatment is almost complete sterilization. The sam- 
ples of water taken the morning after the water had been dosed in no case 
showed more than 26 bacteria per cabic centimeter. And what I believe 
to be a very important factor is that the general average of the bacteria 
is lower, much lower, than during the week when the chemical was not 
used. The effect of stopping the dosage is prettily shown in the Friday 
morning sample, November 19. The pool is used by the “coeds” and faculty 
ladies on Thursday evenings, and it was inconvenient for the writer to 
arrange to have the sample collected. No arrangement was made to have 
the chemical applied. 
SUMMARY AND CONCLUSIONS. 
There are certain dangers to health in the indoor swimming pools. 
The construction of the pools, the enforcement or neglect of rules govern- 
ing those who use the pools, the proper attention to the water supply, as 
to its purity before use by the bathers and after use, all have a direct 
bearing on the extent of these dangers. 
