of Natural Philosophy: — 133 
strength and stress of materials, with various others of minor 
importance, are left entirely unnoticed. We are not pre ar- 
ed to decide how far these omissions are judicious he 
attention of the student may certainly be distracted: by» at- 
tempting to crowd too great a cwariety of subjects within a 
narrow compass ; and it must be admitted that most of the 
miiocine te aaa to, if ceed oad at all, mea bet treated 
principles: which determine the transverse ve of. 
beams, would not be: risplaced, even’ in a work of this lim- 
ited extent. — 
In ‘hese remarks, which might, iff necessary, sd equally 
sefip-aulscaliiceinons “of Enfield are censurable f for not 
making all the changes in their author which would i 
him,—or that the attempt to make these changes, had. 
one leisure and inclination for the task, would be an advisa- 
ble one. It would be quite as easy, and »on every account 
much better, to write a new system. We have made them 
to'invite the attention of those who superintend the philo- 
sophical department in our public con to the impor- 
tance of putting it in their ee » dispense w ea 
a LOAL 
my sanareeret: 
a poze 
re nivel eae siete: part of the erroneo on binseaeuls 
former editions stand uncorrected i in the last, we think. it 
will bed doing th e student an acceptable service, lor ely 
ent ; j th a | t f tk vv 2282S VE eee 
Oe t } 2 ij oe ae 
of this article being intended fart for those who are suffi- 
ciently eee’ in the subject to follow us with a copy of 
Enfield in their hands, our comments will sometimes be 
imade with outs brevity son wight somthin wae 
with clearness. GS ie Gt 
Book I. Prop. 5. “Some pow 
er the reverse of the attraction oar cohesion, Mealed repel 
sion. ” Of th p addu support of | this 
Paes Cee ee eee q oe ression of mer-_ 
cury around ‘iron, and in  capillegy tubes, the suspension of 
a needle by water, and the depre ‘the surface around 
a floating gg of tin-foil,—are so far from furnishing any 
