Document omGoywdgqG1rDwzzQgYZyLMBo

COPY July 18, 1981 Aroolor Testing Mr. mix VI111aw Ur. Howerton V vlh to change the tort proooduro for Westphal spoolflo gravity determinations on Aroolora. Previously determin ations have boon made by sottins Vootphnl at 1.000 whoa plxaanet is lmasrsed In water at standard temperature, than with Veetphal at this adjustment to immerse the plosast In Aroolor at the same tanperaturo and take the roadlns* The proooduro wo wish to use la to balaaoa the Mastphal with pluemet In air, than obtain roadinsa with tho planet first in Aroolor and aeoond ih water. The first roadlns divided by the aeoond roadlns give* the spoolflo gnrity. The aeoond roadlns iiiaewafcer ) is, of oourao, oonstant for any given tempera ture. The revised proooduro gives spoolflo suavity ooxreotly for any Indioatod temperatures suah as 69*/d8* or 90m/90m,, The proooduro used heretofore is faulty in that the figures obtained are comparative only and not aoourete opeolflo gravities. Sinoe all past data is based on the water adjust ment method, wo have determined tho spoolflo gravities of all Iroalors by the too methods to show what differences exist in order that proper allowances may be made in duplicating previous figures and in making oomparioons. Please advise if there are objections to change in method of test not oovered by the data supplied regarding effect of this ahaago. Copied Sept. 7, 1981 JRV A. B. Garber STLCOPCB4072190 *- 0 T sgioifio cauivnrr or abooiobb Standardising la Hr and Standardising ja Tatar Tanp. 65/60* w0 00 m 0- m 0. 0 ww 0 99/SO* 00 m 00 Arooior Hit 1US 1840 1164 1160 lies Souapla So. In H.O 1 1.1860 8 1.1600 1 1.3490 8 1.866 1 1.488 1 1.5860 8 1.584 1 1.597 8 1.598 1 1.681 8 1.616 la Hr 1.1891 1.1354 1.5771 1.3786 1.4308 1.0304 1*5889 1.4170 1.4188 1.6484 1.6877 Dlffaranea .0086 .0019 0076 .0076 .0078 .0089 .0089 .0800 .0203 .0284 .0817 Sp. Or. ot H,0 at 60*0 .9888 Sp. Or. af HfO at 90*0 .9671 lhaa tha all aathad af standardising tha fcalaasa was raa# tha old valghta that had haaa la aarvlea vara nsad. sat af asv waists wars usad sfcaa ths Tastphal vas rtuliHinl la air. Ooplad Sapt. 7, UK sw 312205 STLCOPCB4072191