134 
The 657 inland sources are, with the exception of five research in- 
stallations, U. S. Weather Bureau, U. S. Naval Air, U. S. Air Force, or 
Canadian Meteorological Division stations. Data for all stations are 
usable, and all except those taken by the research groups are published. 
The USWB Cooperatives and CMD Class II, III, and c stations 
comprise by far the largest single source of data ascertained by the 
project. This source represents half of the total number of hydrographic 
and meteorological stations existing within the Great Lakes watershed. 
Data recorded by these stations, while few in variety, are basic to 
future studies that may examine applicability of meteorological 
parameters to hydrographic and fisheries problems. 
presents a breakdown of sources from which data of apparent use to 
studies of Great Lakes hydrography and meteorology are available. En- 
tries in this table have, as in Table 4, been categorized as onshore or 
inland, and are presented in terms of absolute number and per cent of 
total for each type agency. 
Table 5, entitled Summary of Knowledge of Usable Data Sources, 
The principal difference between Table 5 and Table 4 is the effect 
of the 47 water and power plant installations for which there were 
few usable data or with which no contact was established. These are 
not accounted for in Table 5 which shows the percentage distribution 
for usable data sources only. The reduction in numbers is reflected by 
the drop from 8.3 per cent in Table 4 to 6.5 per cent of the total in 
Table 5. Power plant and industries percentage took an even greater 
proportionate drop since 21 of the 55 plants pussessed few usable data 
or else no contact could be established with plant personnel. 
The results of this investigation are displayed in Tables 1, 2, and 
3. The following data sources are not included in the Tables for 
reasons given on p. 110: 
l. River discharge information obtainable from the U. S. 
Geological Survey and Canada Department of Northern 
Affairs and National Resources. 
2. Information relating to meteorological observations 
obtained by lake freighters and other vessels. 
Table 1 lists the sources of usable hydrographic and/or meteoro- 
logical data that are located within two miles of the lake shores. 
Table 2 lists the sources of usable meteorological data located . 
more than two miles from the lake shores, but within the confines of the 
Great Lakes drainage basin. There are certain exceptions, namely, 126 
YU. S. Weather Bureau and Canadian Meteorological Division weather 
stations which lie just outside the limits of the drainage basin, but 
have been included in the compilation to provide more complete coverage 
in certain areas. 
Table 3 lists the potential sources which were investigated and 
found to possess no usable data. This table also includes those agencies 
with which suitable liason or contact could not be established. 
