( sii} 
vated, with their variation from local caufes 3 collect all the various 
names of thefame fruit, and fix one as national, to prevent a confufion 
that often fruftrates information both foreign and domettic. 
Fifh-ponds are ufeful decorations in places diftant from lakes and rivers. 
I have often wondered why this advantage is not derived from ponds 
and ftreams which are fo common: a ufelefs and unwholefome fwamp 
may thus be changed into an elegant improvement. A German author 
has wrote a valuable treatife on the fifh-ponds of Bohemia. The fubje& 
has alfo been well treated by feveral ceconomical writers of Sweden : in. 
which country fith-ponds of all kinds are very common. 
ARTICLE. Phyfico Mathemacical enquiries. 
Machines for abridging human labour are efpecially defired in Ame-- 
rica, as there can be no competition between them and the arms of in- 
dufrious labour, while thefe have full employ on her extenfive lands ; 
which mutt be the cafe for ages. Agriculture has the firft claim to the 
exertions of mechanical genius, as the principal fource of national prof- 
perity. Extent of territory, improved by artificial induftry, mutt yield 
a great quantity of products at fo cheap a rate, as to bear exportation 
to very diftant markets. It is moreover a weighty confideration to the 
humane philofopher, that agricultural’ mechanifm would in the South- 
ern ftates fupply the labour of flaves. Among important defiderata we 
‘may place thefe A machine for fowing broad-cait, fo as to fpread 
the grain even and in proper quantity: another for cutting drains, and 
making banks on our extenfive marfh-meadows : an apparatus for clear- 
ing new lands; which ought to bea compound of coulters, faws, axes, 
and fcrews; fo that the trees may be pulled out of the ground, cut 
in convenient pieces, and heaped: a better inftrument for reaping than 
the common fickle, fuch f.e. as the cradling fcythe of Northern Eu- 
rope: temporary fheds of eafy and light conftruction for the pre- 
fervation of the reaped’ grain in wet feafons. 
The many fhipwrecks that Happen.on the extenfive, and often ftormy 
coaft of this country render diving bells very neceflary ; thefe machines 
are yet but little known. 
A pienty of naval ftores, and numerous ports render fhip-building an 
‘important branch of national induftry. This noble art, which has long 
been cultivated with fuccefs, would ftill be much improved by more 
expeditious. modes of hauling timber, and of preparing the main pieces 
for thg finifhing workmanship. 
An 
