Tli c coinpara tivc aiia t om? of tlie small-int cst iiiol c~irculation lias received remarkaljlj-iittlc attentioii. Our interest in this sahject dates I'rom attempts to reproduce in the clog the arid c~mbolisrn. Having: little success, aiid being imliresscd by the great power of rcvascularixati on shown by tlic dug, it occurred Aided hy grants from thc Coiiiliiittee on Scientific Rcscnrcl~ of the A n i e i i c~~~i ociation, the Tlicoclore A . McGrnnb"Und, :111d the M C G T P~O P l~hiid 093 ~1 1~1 n i m r r A x JOT-RJAL OF WA'PO\IB T-UL 7 3 , N O ; h O \ E:xlILII I'L1 :These finrlings we cannot confiriii e w q t in t h e dog: n e aic in agreement Ivlth Dnight ( '03) that t h e 11umaii v a s t recta dn not inteiroinn~uiiicatc during their c m r w f i oiri the peripheral arcades to tlic intestinal wall.' The p~essnrcs listed are avcmge and must be reduced somcwhnt in the caae of mialler aiiimals to a\ oitl ruptiirc of thc finer ve.;sels.Ethyl alcohol caiiiiot h e used becausc of its t?nrleiicy to remove sornc of thc pigment, cspeeiallv ttrc red, froiii ilrc iniectioii iiiaqses.

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