THE time had come when an account of the chemistry of lecithin and allied substances should be written and must be, read by everyone interested in bio-chemistry. Ten years ago it had not. At that time the subject could only have been presented as an unprofitable series of disputes on insecure premises. Now there must be many for whom this monograph will be a revelation, many who, though they may have read, have not collated the important contributions to the elucidation of this most difficult subject that have appeared in the last few years, and who, when they see this done admirably, as it is done here, will realise that a new epoch in the history of bio-chemistry is being marked out.
Lecithin and Allied Substances: The Lipins.
By Dr. H. MacLean. (“Monographs on Biochemistry.”) Pp. vii + 206, (London: Longmans, Green, and Co., 1918.) Price 7s. 6d. net.