Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . ranged in order of magnitude and divided into two groups,according to whether the sample was taken on a street with acar line or without. In Diagram I. a division is also made on thebasis of paved and unpaved streets. The heavy center line at theintersection of the cross-hatching divides the two groups in eachcase. On account of the undue weight given to certain extremeresults in computing the mean or average results the median figureas well as the mean has been indicated on the diagrams. A keyto the loc
Transactions - American Society of Heating, Refrigerating and Air-Conditioning Engineers . ranged in order of magnitude and divided into two groups,according to whether the sample was taken on a street with acar line or without. In Diagram I. a division is also made on thebasis of paved and unpaved streets. The heavy center line at theintersection of the cross-hatching divides the two groups in eachcase. On account of the undue weight given to certain extremeresults in computing the mean or average results the median figureas well as the mean has been indicated on the diagrams. A keyto the location of samples is given in Tables IV-VI. It will be noticed that in each diagram under the head of totalsolids both the mean and median figures are higher for thosesamples collected on streets with car lines than for those collectedon streets with no car lines. This is not on account of the poorcondition of the pavements on car line streets, for with only oneexcention the survev showed the surface of such streets to be 218 STLDIES IN AIR CLEANLINESS 3oo, \ 600. *- 700. /reo» ?4S4-. /o // /S /3 /4 /S /6 /7 /d TOTy^Z JV?Z/^J /^aoft ?40Z.
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Keywords: ., bookcentury1800, bookdecade1890, bookidtransactions, bookyear1895
