72 Notices respecting New Books. 
and choked as this is, there is scarcely a possibility of delving 
through all the obstacles with which the versatility of time, the 
roots of prejudice and error, and the fashions and corruptions of 
language have conspired to fill it: and though it may be possi~ 
ble to remove some of the obstructions collected about its source, 
so as to get it to trickle, yet shall we never be able to come ex- 
actly to the fountain-head; and it would be a useless and un- 
profitable appropriation of time to attempt it, since what is im- 
possible cannot be. But, very fortunately for us, it happens that 
such nicety is by no means indispensable to the success of the 
argument we are upon; which requires only, that we should de- 
duce no judgement but what is conformable to the declaration of 
Moses ; and that, subjecting ourselves to this restriction through- 
out, we should endeavour to work our way, as near as the cir- 
cumstances will allow, towards the truth.” 
[To be continued. } 
Mr. Accum has in the press, “* Chemical Amusement,” com- 
p ’ 2 
prising a Series of curious and instructive Experiments in Che- 
mistry, which are easily performed and unattended by danger. 
p be A ie aie a 
Mr. Newman, Soho-Square, has just published a work en- 
; > quare, J B 
titled “ Chromatics; or, An Essay on the Analogy and Harmon 
Z d 3 ? 
of Colours.” 
Speedily will be published, in one volume octavo, A Practical 
Inquiry into the Causes of the frequent Failure of the Operations 
of extracting and depressing the Cataract; and the Description 
of a new and improved Series of Operations, by the Practice of 
which most of these Causes of Failure may be avoided.  IIlus- 
trated by Tables of the comparative Success of the old and new 
Operations. By Sir William Adams. 
The first number of a new periodical work, entitled ‘ Journal 
of the Academy of Natural Sciences of Philadelphia,” has just 
reached this country from America. It contains, 1. Description 
of six new species of the genus Firola, from the Mediterranean, by 
MM. Le Sueur and Peron; with a plate. 2. An account of the 
new mountain-sheep, Ovis moniana, by Mr. George Ord; with a 
wood-engraving of the horn of the animal. 3, A description of 
seven American water and land Shells, by Mr. Tho. Say. The 
work ends with an invitation to naturalists to make use of the 
Journal as a medium of communicating science. 
It is expected and hoped that Mr. Abernethy will publish his 
very excellent observations on the discoveries of the late cele- 
brated John Hunter in comparative and human Anatomy, de. 
ee livered 
