fr 5 ve ie we , F . i Bo a : aheae Bs ’ ". aa va + ethene o a a . 2. ° , s ' | oe 2° ~ s ‘ . * < i tpt y eit let ititi tls phudantnel ” bet tl ft che hi : a ee 7 LOGARITHMIC . wo Ser a : i ir’ ft fils t re Given any twa corresponding qua for third by laying rule through , solve & ba a & Lye ree . On propscaie. MANEUVERING BOARD . Lu Price 75 cents (per pad of 50) - ; : -* ot Ma teaess 8 i tT A R } 8 { ce a PR ats oss J] 2 7 Washington OC ou ates an | under the autror ty 4 te ck