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The article presents comments of the author on the article, "Regional Differences in the World Atmospheric Circulation," by John R. Borchert, published recently in a issue of "Annals of the Association of American Geographers." Nonetheless there is considerable question concerning the significance of the five maps that are the core of Borcherts presentation. These remarks are directed to a brief consideration of the significance and interpretation of his maps. It is only proper to think that in the body and foothotes of his paper professor Borchert indicated some of the limitations of his study, that the scale of the maps did not permit the delineation of zones and regions in detail.

Consider two isarithmic maps of continuous actual or abstract phenomena in the same area. Research into the character of the relationship may be pursued in various ways depending upon the interests of the investigator and the level of generalization he hopes to obtain. This paper treats some of the cartographic problems inherent in such an investigation and presents the results of an inquiry into the relation between two statistical surfaces in the Great Plains area. If a correlation analysis were undertaken employing data derived from these two maps the resulting index of simple correlation would reveal that the two distributions are in general highly correlated positively, which is not a surprising fact.

The article presents some comments of geographical researchers on the research papers submitted by them. Just because settlers prefer to locate farmhouses close to a road does not mean that in doing this they also choose non-central locations with respect to the rest of the farm. Working land on both sides of a road is quite common. Also, the tendency of farmhouses to cluster along a highway can be discerned via machine map reading techniques. Quadrant sizes smaller than the period of the road network would detect these. And such linear clusters would not, of course, be related to the settlement processes that are discussed in "A Location Theory for Rural Settlement," by J.C. Hudson.