A surrey of tltc litcraturc rcvcnls tlint wltilc tiuiticcoiis dictnry sitrreys hnvc bccti carried out iti Grcnt Jjritniti, in iiotie of thou1 lias nil nttctiipt bceti ttiadc to m c s s thc ritniiiin-B, ititnkc of tlic subjects coticcrticd.* This is not sitrprisittg ns it is oiily itt rcccitt years tlint rcliablc figures liavc becti nvailnblc for tlic B, cotttctit of tlic diffcrcttt nrticlcs of dict iti cottiiiioii use ; i t is also otily rclntivcly rcccntly that tctttntivc ngrccttictit Itas bccti rcuclted itpoti what coimtitutcs nil ndequatc intake of the vitntiiin. Tltc purpovc of this work wns to detcntiitie, frotii 011 ntinlysis of the avuilnblc dietary survcys, tltc udcqiincy or otlier\visc of prcsctit-day vitamin-13, intnkcs.
Sticbcliiig ntid Phipardl linvc cnrricd out a dietary survey in the Uiiitcd Stntes in which the B, iiitukc wiis cidculntctl. Owjug to tltc din'creiit food Iiiibits in thut country cotiq)nrctl with this oiily gcticrrrlizritious as regards this country cnti bc clriiwn from tlicir work. Thc fgurcs cnlcrilntetl I)y Sticbclitig iltid Pltipiird together \vitli tlicir 13, rcqiiirciiietit-tiinti-mlue scnlc nrc discussed lntcr it1 this pitpcr.
1)ruiiitiioiitl el d . 2 hnvc cnlciilntcd tlic ritiiiiiiti-B, coutctit of tlic six iticoiilc groups iiito which tlic populatioii of Grcnt 13ritniii hiis bccti divided by Lloyd3 iititl Orr,b ntid this, together with Druuiiiioiid's obscrvatiotd3, as fiir ns \vc nre nwnrc, is the oiily iittciupt which has yet Lccii miidc to givc IL clcnr picture of the stntc of tiutritioti in rcspcct of vitniiiiii-BI in this coutitry.* In this irivcstigntioti, Iiowcvcr, t i 0 dctnils ware givcii of the B, cotitelit of tlic diflcrciit foodstun's. I~urthcr, Prof. I~riiittitiotid is iiow of the opittioii that in tho light of rcccttt work Itis cnlcitlnted iigurcs for Bl ititnkc nrc too liigli.5
SCOPE AND DETAILS OF THE ANALYSIS
Four dictnry siir\ys wcrc avnilublc : 1. The study of r,loyd3 niid Orr' wliich otiibmccs tlic \vltolc populiitioii of this country.
JI. : \ study of tlic dicts of 205 fiimilics iti thc 1Vcst liidiiig 01' Yorksliirc.