Excerpt from Tissue Respiration in the Light of Recent ResearchThobleachingoftheeolublel'nnlan bhrointhegelatineinjoctionmasswasattributsdtorsdudr'onoftho blue potassium ferri-ferrecyanide to the colourless di-potesdurl ferrc-ferrocyanide, intermscfphysicalchemistrytothoremoval ofapositivoionicchargeofelectricityfromthetai-valsntferric-lon. Sirnilarreeultewersobtainsdoninjectingthevescularsystemof theeurvivingkidney. Itthenoccurredtomothetil'thekidney couldreduceapigrnentwhichwasetillinitsvessels.theorgan, if injected under suficient pressure, mightbeconstrainedtooxcrete anartificialurinethroughthenormalchanneloftheureter.l fotmditpossibletoefiectthis. Oninjectingintothearteryof a sheep's kidney the warm soluble Pruuisn blue and gelatine mixture, Iohtainedfromthecannulatedureterafew drops of an absolutely colourless substance - an artificial urine - which on being treated with hydrogen peroxide at once became blue. The kidney had, then, excreted some gelatine and reduced soluble Prussianblue, provingthatthesesubstanceshadtravelledfromtho bloodcapillariestotheureterandinthepessagehadbeenreduced bythestilllivingrenelepithelium. Butaftcratimeitwasnoticed thattheout¿owfromtheureterhadbecomeblue.thekidneycells hadbecomepoisonedandsonolongerabletocarryontheirvital reduction. Itisnot to besupposod that the living tissuescan with shudformorethanecertaintimetmatmentwithsubstcncu which cannot be other than ultimately toxic for them. In later experimentsferricchloridewasusedwithboththelivsrandkidney inordertodcterminewhethcasubstencedevoidofoxygencould be reduced to the lower form - ferrous chloride - on being per fusedthroughsurvivingorgsns. Fromthekidneywasobtaineden artificislurinewhich contained ferrous chloride, andsomeferrous chloridewesprseentintheliquidwhichemergedfromtherenal vein Similarresultsweregotwiththeliver, frornitsbileduct ferrous chloridewasdrawno¿ (artificial bile)andintheiluid from fire hepatic vein some ferrous chloride was present.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.