New Publications: 195 
pofure to the fmall-pox infection is unavoidable, and the 
confequence of infection at the time dangerous (as in preg- 
nancy), inoculation with the former might, by its quicker 
action, produce that change in the fyitem which would in- 
fure the Teaft deadly of the two maladies. 
To urge to fuch inquiries as may afford 4 fufficient num-= 
ber of fa&ts, from which to draw all the ufes that may be 
derived from a profecution of this fubject, feems to be the aim 
of the authors; and no fagacity is required to predic, fays 
Dr. Pearfon, that, fhould the practice of inoculating for the 
cow-pox ever become very general amongft young perfons 
(which we hope will be the cafe), the variolous infection 
muft be extinguifhed; and, of confequence, that loathfome 
and deftru&tive difeafe, the fmall-pox, be known’ only by 
name.” And this benefit will accrae, without even the allay 
of the introduétion of a new difeafe ; it being plain front the ~ 
nature of the cow-pox ‘poifon, that’ (the other being once 
rooted out) it will be eafy to avoid and prevent its diffemi- 
nation—as there muft be at leaft a real conta with ‘it to 
caufe infe@tion. 
Philofophy of Mineralogy. By RoBERT Townson 
LL.D. FERS. 8vo. 
__This is a,valuable performance, and will be highly ufeful 
to chemifts and mineralogifts. It gives an account of the 
elementary fubfiances which enter into. the compofition of 
minerals, followed by an enumeration of compounds ar- 
tanged according io Dr. Babington’s fyftem ; interefting,in- 
formation refpecting firatification; the irregularities of the 
earth’s furface, veins and petrifactions; the value and jufe 
of the external characters of minerals; a good nomenclature 
in.Englith, Latin, and German, with their correfponding 
definitions —colour, figure, furface, &c. &c.; inftructions 
for collecting fpecimens ; and a lift of works on mineralogy. 
«o This work is the outline of a larger formerly announged, 
but which did not meet with the neceffary encouragement. 
We fhall ftill hope, however, to fee it made public. 
0 2 INTEL 
