Correction of Formula

Issue 4 and Volume 128.

Correction of Formula There were two typographical errors in the article on the derivation of the formula for nozzle reaction on page 22 of the February issue of Fire Engineering. In each case the square root signs were left out. The first formula should read: NR = GPM X √P X .0505 The last formula should read: NR = (GPM)(√P)(.0505)

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