. American X-ray journal . nds, was without an)history of jaundice or digestive distnrb- attack of colic which the doctor thoughtwas due to gall stones. The skiagraphshows dark shadows in the region of thegall bladder. At the autopsy, three gallstones were found in the viscus. THE AMERICAN X-RAY JOURNAL. 1108 A New X-Ray Tube. What promises to be one of the bestx-ray tubes yet made is known as theTruax-Greene Improved German appearance this tube slightly resem-bles the Mueller self-regulating tube,but it is larger. The vacuum is reducedby the direct admission of air throughthe capillar
. American X-ray journal . nds, was without an)history of jaundice or digestive distnrb- attack of colic which the doctor thoughtwas due to gall stones. The skiagraphshows dark shadows in the region of thegall bladder. At the autopsy, three gallstones were found in the viscus. THE AMERICAN X-RAY JOURNAL. 1108 A New X-Ray Tube. What promises to be one of the bestx-ray tubes yet made is known as theTruax-Greene Improved German appearance this tube slightly resem-bles the Mueller self-regulating tube,but it is larger. The vacuum is reducedby the direct admission of air throughthe capillary valve V by simply turninga milled head. It is raised by means ofan absorbent substance contained in thesmall auxiliary bulb, which is con-nected with the main tube, on the sameprinciple as in a Mueller tube. The advantages of the Truax-Greenetube are two: First, the vacuum can beraised and lowered rapidly; Secondly,this can be done while the tube is inaction without changing any connec-tions. When in use, the anodal con-. nection is made with the wire on theauxiliary bulb. To raise the vacuum,all that is required is to raise the buttonon the end of the spring which connectsthis with the main tube, thus forcingthe kathode stream in part into the aux-iliary bulb, in which the gaseous parti-cles are absorbed. Without knowing the extent of theexperiments which have been performed with this tube it is impossible for us toSay what the capacity of the absorbentis, but we presume that it is amplysufficient for the life of the tube. The Chicago Electro-MedicalSociety. This society was organized June 25,1901, by Drs. A. W. Baer, G. G. Bur-dick, S. V. Clevenger, Emil H. Grubbe,EL Preston Pratt and Richard H. Street,for investigations in the science of elec-tro-therapeutics. At that date, only alittle over a year ago, many of the olderregular medical journals refused to pub-lish reports of cases treated by the x-rays or static electricity. Indeed, thegreat majority of physicians, knowing
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