. X-rays simply explained : a handbook on Röntgen rays in theory and practice . )osures. In choosing between the 8trij)S it must be borne inmind that a longer ex]) is retjuired for the wristand ]ialm than for the linger-tips, and that a com-])romise must be made between them to get the bestgeneral effect. Printing.— is almost invariably best forX-ray work, though, if a print be urgently required,it may be made on glossy bromide paper. Radiographs may even be taken directly uponrapid bromide paper, several copies being obtainedin one exposure if the necessary number of pieces isused
. X-rays simply explained : a handbook on Röntgen rays in theory and practice . )osures. In choosing between the 8trij)S it must be borne inmind that a longer ex]) is retjuired for the wristand ]ialm than for the linger-tips, and that a com-])romise must be made between them to get the bestgeneral effect. Printing.— is almost invariably best forX-ray work, though, if a print be urgently required,it may be made on glossy bromide paper. Radiographs may even be taken directly uponrapid bromide paper, several copies being obtainedin one exposure if the necessary number of pieces isused. Such prints are paper negatives in which theMesh shows darker than the bones. The only meritin the process is a saving of time and of smallexpense. For further details of photographic methods thereader must consult suitable text-books. Stereoscopic Radiographij.—Curious and usefulresults are obtained from a pair of radiographs ofan object so taken as to produce an appearanceof solidity when combined in a stereoscope. The PRACTICAL \-KAV WORK 1)7 IlATK Partridge, showing Foot bkokex by Shot. The curious darkpatch in the middle of tlie body is the gizzard. Exposure 1^minutes. Alternative spark 4. Distance between tube andplate 18. Other conditions as for Plates III. and IV. 19—7 \)H X-HAYS i:\lL\l\i:i> iiiillmd adopUd is lo iiiovc ilir lulu* ill a diruclinnpiinillol to lh(» piano of Uic plate lntwcoii two ecpialexposures taken on separate jjlates: the nisullin;^negatives (or |»iints from iImih), wlicn viewed in ;istiMeoseope, i not exliii>it tlu* true stereoKeopieetlect wliicli wttidd he a])paient to an ol>server jjlacedwith his ryes at tin pnsitinns occuj»ied successivelyhy the anti-eathodr oi I he inhe, even assuininj^that the hndy ohscrvrd were translucent and illu-niinaled hy (Htlinary liirlit. In stereoscopic iadio<4ra]»hy «tnly shadows are(•niiihinecl, and the ejlect of solidilN. iIkhi^Ii strikintrand often Iteautifnl, is in a sense s
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