256 There are many ways thet records can be kept. To keep them uniform, I suggest the use of forms. These can very according to the individual pool and generally they ere quite similar, These records should be kept by the Cashier, Manager, Maintenance man or any one in similar position, however} it is necessary that some one who is interested and some one in which you have confidence, as a felse entry may be the easiest or quickest way out, of course in a case of this kind, the records are not correct and they are of no value, I have a covy of the 5,E, Form §.P. —- 2 Division of Sanitary Enginecring Departm nt of Public Health of Illinois. This form incorporates most of the information suggested in this paper. If th se forms are properly kept, which I think they arc, in most cases, mich valuable information can be obtained from these records. A study of these reports will be time well spent, by the pool operators during long winter evenings. I hope that some information contained in this paper has been of some benefit to some of the pool operators end will assist them in making their pools better places to swim and pay better end lerger dividends on their invest- ments.