i6o 
Analyses of Books. 
[March, 
evidence to show whether vaccination from the calf gives better 
resuftTThan doeT the transfer of vaccine lymph one human 
being to another. Perhaps statistics on this point aie not pro 
CU The greatest difficulty connected with the subject ^ under- 
stand how, if Mr. Wallace is in the right suet ia jaat ^ J 
of medical men uphold the pradtice. The fees for ^cinat 
are small and if the profession were so much under the do 
^ setfdnierest, as i? is asserted by anti-vaccinatiomsts they 
would be reludlant to check the spread of a d '““' i n a dozen 
of which must bring them more emolument than a dozen 
vaccinations. 
Nature's Hygiene. A Systematic Manual of Natural Hygiene, 
cltaWng also an Account of the Chem.stry and Hyg^ne 
nf the Eucalyptus and the Pine. By C. 1 . Kingzlt , 
F.C.S. Second Edition. London : Bailhere, Tindall, and 
Cox. 
This work since the appearance of its first edition, has been 
much enlarged, and indeed to some extent re-written. Its first 
Dart now forms a very complete manual of hygiene whilst the 
P j : s devoted to the special consideration of the Pine and 
the Eucalyptus as sanitary agents. The title selected, “Nature s 
Hv-iene ” is significant, since it is the author s especial objett 
toDoint out the existence and the modus operandi of natural 
means for the destruction, or at least repression, of zymotic 
diS i e n S certain introductory chapters, containing chiefly matter 
wi th which our readers will be perfeaiy familiar, the author 
shows that the great natural disinfectant is hydrogen peroxide, 
!TJ ^occurrence of ozone in the atmosphere being by no means 
decisively established. Whatever processes therefore, whether 
in the organic or the inorganic world, by which hydrogen peioxic 
is evolved, must of necessity contribute to sanitation. , 
From these generalities we pass on to consider the author s 
views on some of the great hygienic questions of the day. Mr. 
Kin^zett regards the inorganic constituents of water as uno - 
Sionable in drinking-water. This is a rightful protest agains 
the Sensationalism which summed up carbonate of lime amidst 
the impurities which alarmed Londoners were said to be swal- 
ow in» by hundreds of tons. But our author would agree that 
°ad present in water renders it unfit for dnnkmg-purpo.es, as 
