84 ROCHESTER ACADEMY OF SCIENCE. [June 23, 
by the following table compiled from the records of the health depart- 
ment of the city: 
TABLE SHOWING ACTUAL NUMBER OF FATAL CASES OF TYPHOID FEVER 
IN ROCHESTER FROM 1870 to 1889 INCLUSIVE, AS COMPLIED 
FROM THE REPORTS OF THE HEALTH OFFICER AND 
RECORD OF THE HEALTH OFFICE: 
MONTH. 
SOs 
ah | | 8 S83 
YEAR. | Z 3 aoe | ees oir) 
: & ieee =z Ss o | = aa hee al o s S | s Ss sae 
S28 S | 21S) 22) 218) Se 224) eo ee 
LS 70% 2 3 I 2 I Eo line (ere ie a(S 3 || 54 | 62,386 0,864 
1875 | 3 2 2 I ONP RBIS Selita es ave 3 || 30 | 66,253/0,453 
1572 ener 2 Z| Sel Dal 8) ero (17, 8 | 10 || 70 || 70,120/0,999 
1873 | 5.| 6] 4| ©) 4] 2) 2] 5) 5 | 12} 6 | t0-|| 61 |) 73,087\a. Ree 
1874 Lea Crate Tes |peT BAe | 15) 4) OE 5 6 || 41 || 77,854|0,527 
1875 °] S34) | ar) 2h ge 21g et Cees ram gal saa epee ene 
Kyou) Boil Bah 2 Dralion 1b ea Ng \eeae rll ment sy |e 21 2 || 30 || 83,25010,373 
LOZ 7) ||| 2 leOm ogy nz I oo} o|] 4) 5] 5 | 6&1 2 || 27 I 84r780lorRo7 
197/500 eel | I oO I ri a I ZI eval P= 10), || eGo I || 17 || 86,310/0,197 
1879 eae I 3 I I o 2 I I 4 2 || 17 || 87,840]0, 193 
0/1} 1.) 1] tT} -o| o] a} 5) 0] 7} 3} 4) 25 |} 80,g6blo,2am 
TSOK |) 2 oral ee I co) I Oneal a5 Galea! 1 || 26 || 95,000/0,276 
BOOZ 7" yal gee 3 3 I oO oO} 4) 5 | 4 5S Wes ornt 93,488 0, 305 
SSS aaa feeb Re cal hen ahs al ee al er a eee Glee er mee Rags | 103,478 0,377 
1884 | -3 | -o | 2) 340 cerca 2 fat - Ze) ool: 9: 1-43 | ros eae ner 
LOSS | Onl 2 | I Zeon On en Paoli Me neve ae I || 32 |113,169|0,282 
1886} 01° Te |g ites oP da 3 ee |e cel ial cae ian ae ames 
1897 1 3 fe 24a) WN oukror|: aelio2: |Pheel? Gm mle sella ool zeae qa 
1888 5 | 4: eon 22 I 1. orl 140}! Onl 2 2 | 54 ||128,832]0,402 
L3SQ5|) St Wee To eons I Coiled alleen! Oniimes) “ | 39 | 134,342|0,216 
Tot’ls, 64 | 37 | 32 | 33 | 32 | 22 | 35 | 69 |106 |154 | 85 | 78 747 | 
890 | 31 2/ 3 ee acto | | | 
We cannot, however, hope to be thus fortunate always, and the 
resulting uncertainty as to future conditions constitutes a strengthening 
of the argument for the special studies indicated in the foregoing. 
Dr. Henry B. Baker, Secretary of the Michigan State Board of 
Health, following Pettenkofer, has shown in a paper in the Annual 
Report of the Michigan Board for 1884 that there is in Michigan a 
relation between low water in wells and the prevalence of typhoid fever, 
and while we have no observations as to the elevation of water in the 
Springwater wells during September and October, 1889, we have com- 
piled, as furnishing a basis for comparison, a table showing amount and 
distribution of rainfall at the foot of Hemlock lake and elevation of 
surface of Hemlock lake from May, 1889, to January, 1890, inclusive. 
From a study of this record in conjunction with the temperature record, 
