1890.] 
139 
[Crosby. 
exception the normal chlorine increases from west to east, slowly 
at first, and more rapidly as we near the coast. The main facts 
are presented in the following table, which I am kindly permitted 
to copy from the proof-sheets of a forthcoming report of the State 
]>oard of Health. The first column gives the sources of the waters, 
commencing with those farthest from the coast ; the second, the 
number of monthly determinations of the chlorine ; the third, the 
average of all the determinations ; and the fourth, the highest and 
lowest determinations. The results are expressed in parts per 
100,000 : — 
TABLE OF NOHMAL CHLORINE FOR MASSACHUSETTS. 
SOUBCES OF WATER. 
NO. MONTHLY 
DETERMINATIONS. 
AVERAGE 
CHLORINE. 
EXTREMES OF 
CHLORINE. 
North Adams, Notch Brook. 
11 
.00 
.02- .09 
Lenox, Brook Reservoir. 
12 
.07 
.04— .09 
Pittsfield, Sackett Reservoir. 
6 
.08 
.07— .10 
Montague, Lake Pleasant. 
21 
.10 
.07— .16 
Greenfield, Glen Brook. 
12 
.11 
.05— .16 
Leominster, Haynes Reservoir. 
21 
.12 
.08— .16 
Springfield, Ludlow Reservoir. 
23 
.12 
.08— 20 
Worcester, Tatnuck Brook Reservoir. 
23 
.12 
.08— .16 
Southbridge, Reservoir. 
24 
.13 
.06— .21 
Fitchburg, Scott Reservoir. 
24 
.14 
.10- .19 
Clinton, Lynde Brook. 
13 
.16 
.13— .19 
Hudson, Gates’ Pond. 
24 
.20 
.16— .23 
Wayland, Snake Brook. 
20 
.23 
.17— .30 
Ashland, Reservoir 4. 
24 
.23 
.19— .28 
Haverhill, Kenoza Lake. 
20 
.34 
.30— .39 
Danvers, Middleton Pond. 
24 
.35 
.24— .47 
Fall River, Watuppa Lake. 
24 
.52 
.48— .63 
New Bedford, Acushnet Reservoir. 
24 
.53 
.46— .67 
Plymouth, Little South Pond. 
7. 
.62 
.56— .68 
Nantucket, Wannacomet Pond. 
8 
2.16 
2.03—2.25 
