. Archives of physical medicine and rehabilitation . etween the wire and the eliminates any possible error dueto the presence of ionizable air in thetube. The instrument is thoroughlygrounded to prevent the accumulationof static. The Standard lonotoquantimeter hasbeen developed in our laboratoriesunder the direct personal supervision ofDr. Robert S. Landauer. Dr. Lan-dauer was for several years associatedwith Dr. G. L. Wendt at the Uni-versity of Chicago, in a study of theeffects of ionization in gases. Drs. .A. W. Erskine of CedarRapids, Iowa, and B. H. Orndoff, , A. Bachem
. Archives of physical medicine and rehabilitation . etween the wire and the eliminates any possible error dueto the presence of ionizable air in thetube. The instrument is thoroughlygrounded to prevent the accumulationof static. The Standard lonotoquantimeter hasbeen developed in our laboratoriesunder the direct personal supervision ofDr. Robert S. Landauer. Dr. Lan-dauer was for several years associatedwith Dr. G. L. Wendt at the Uni-versity of Chicago, in a study of theeffects of ionization in gases. Drs. .A. W. Erskine of CedarRapids, Iowa, and B. H. Orndoff, , A. Bachem. R. A. .Arens, ^—«-*A /TiA^Of^ /fOi*^!^ ^WiftiC COAlMCr^ 100 Tdand Td= Th us, 1 f Ts: 20 seconds,10x100dose will be 20 Care of InstrumentThis instrument, embodying as itdoes, the principle of the electroscope,is extremely sensitive. It is a high classscientific instrument and must be treatedas such. Any jars or knocks are likelyto break the fine pivot bearings of thealuminum leaf. The instrument has beenbuilt with the utmost care and and E. L. Jenkinson of Chicago, wereconsulted frequently during construc-tion of the Standard lontoquantimeterand offered valuable suggestions andcriticisms. NEW EQUIPMENT —Instead of using paraffin it is than ordinary tissue, while the resistance more convenient to use, and under considered better practice to use water. of water corresponds very closely to average conditions is sufficiently ac- Paraffin is a few per cent less resistant that of tissue. However, paraffin is curate.
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1920
