548 EPIDEMIOLOGY 
a map of the community, taking into account also the time of year, 
and other general points. But such deductions, while often wonderfully 
reliable, can never be as conclusive and satisfactory as are the results 
of an investigation by even a total stranger, if the investigation be con- 
ducted as above described.” 
The data received from each patient should be recorded on a case 
card. Many different cards have been described in the literature. The 
one given below has been used by the Illinois State Water Survey. 
Others have been described by Hill (1912), Boudreau (1914), Ferguson 
(191 ) and Hansen (1914), 
Suggested Form for Securing Information Relative to Typhoid Fever Cases by 
the Local Health Authorities. 
Record No........ cece cece eens 
TYPHOID FEVER RECORD 
. Name of Patient... 0.0.0... 0. ce ce ence nee e cence eteennenens 
. Residence, Street and Number. .......... 0... ccc ccc eee eee n eee eeceeeee 
. Give Occupation and Place of Business... ........ 0.0... c eee ee eee ees 
. Name of Physician. 2.0... cee cee eee cnet een e eter enee 
. Date when Patient Took to Bed... ........ 0... eee eee 
. Date of First Symptoms... 0.0.0.0... cc cece eee te eee ee eens 
. Date of Physician’s First Visit... 0.06... 6 ce cece ee ee eect eee 
10. Date of Leaving Bed on Recovery. .......0 0.0. ccc eee eee e ees 
11. Date of Relapse... 0... ccc ccc eee ene teenie nes 
12. Date of Death... 0... ccc cece ene eee nent eee nnees eae 
Ce ee a ee ey 
16. If Patient Changed Residence During Two Months Previous to Illness, 
Give Former Address and Date of Change... 0.0.0... .0.. 0c c ccc e eens 
17. Character of Residence (private house, boarding house, apartment, hotel, 
1 a ca 
18. State Source of Drinking Water. At Home, at Place of Business, Else- 
ee re | 
