Show vitamin an discovery aid to scientists ests see possibility I 1 of producing nutritive food now new york unusual interest had bad been aroused in medical circles by the th e announcement of dr walter 11 II eddys professor of physiological in teachers college columbia university of tho the first isolation of any of the five known vitamins dr eddy find and his associates believe that isolation of vitamin D or as dr eddy prefers blos opens up tho the possibility of producing synthetic foods of a high nu au value though lie ho warns patent medicine vendors vendora in this respect dr eddy told a distinguished body of scientists and physicians at tile lie ono one hundred and thirty eighth meeting of tho the society for experimental biology and medicine tit at bellevue hospital medical college recently that lie he succeeded tit in isolating crystalline sub annee which ho he believed to be chemically pure uro blos this substance ivas first described by professor in low produce four specimens dr eddy acknowledged the assistance in tho the series berles of extensive expert ments lie he lias has been making at that lie he has received from dr it II it II williams in charge of the chemical laboratories of the western electric company and dr ralph kerr an expert in organic chemistry at columbia at bellevue hospital medical college dr eddy produced four specimens of the isolated vitamin in test tubes before tho the eyes of his audience ile ho announced at tile tho same time that in four experiments 70 milligrams produced from moist yeast so bo far only a partial analysis has been made the known composition of the substance Is 43 per cent carbon 25 per cent nitrogen and 8 per cent hydrogen further experiments will bo be made nt at columbia to determine tho the coin composition position of the remaining 24 4 per cent in a supplementary statement dr haddy remarks interest in tho the subject was revived in 1010 by dr williams who suggested that blos was actually vita min aln B extracts of substances known to be rich in D B were shown by him to have the power ol of stimulating yeast growth and dr devised a test based on the uso use of yeast stimulation us as a menus means of measuring the vitamin B content of substances ances when this test was submitted to further study discordant results do de vc ve loped tile the final outcome was that while most substances rich in vitamin B do stI mulato yeast growth tho the sti tion may bo be duo not to the presence of vit 13 but to some other factor accidentally associated with it in 1022 1922 dr casimir funk was ab able ie to show that when an extract rich in B was shaken with fullers earth tho the earth would remove all of the power of the extract to cure borl berl bert berl 0 a property exclusively related to B but lid did not remove tile yeast growth fiton factor funk interpreted bi his results to indicate that such extract contained two vit vitamins timins ono one the th factor for which he pro posed to retain tile tho name B D ond and the th yeast growth factor which lie he callei called vitamin D this suggestion of 0 funks bunks originated a controversy contro verey in which various investigators including dr fulmer of iown iowa have taken part these investigators have attempted to show that tile tho yeast growth factor white highly stimulatory to yeast growth la Is not essential to its growth they would reserve the term vitamin to substances producing growth but limit it to such us as were absolutely essential to growth others among them dr mccollum of johns hopkins university believes the term vitamin should be restricted to such factors as are essential to mam mammalian mallan nutrition for these and other reasons the yeast growth factor has been described under tinder the two names fulmer mccullum Alc Cullum etc holding it t better to retain the name originally given it by Wild wildmer ler viz blos blo |