Se 1 
verance, and clofe attention were 
requifite, I deferred the undertak- 
ing till I fhould find myfelf more 
fit for it, 
Detached experiments may in- 
deed be very, ufeful when a fuf- 
ficient number is collected to draw 
fome conclufions from them ; but, 
without purfuing me cally the 
fame object, difcoveri ies “are” to be 
expected only by mere chance, 
and are even fometimes overlooked. 
I owe to the example of my worthy 
friend, the Abbé Fontana, the tho- 
rouse Beatin, ie i I now en- 
| ae but a very “tow ero in 
the hands of thofe who have not 
patience and affiduity enough in 
purfuing one and the fame objea, 
till they difcover fome things un- 
difcovered before ; ; or till they find 
that 
we 
