Patents* 
448 
draulique, noria,” is one, where round earthen pots are tied by their 
collars, between two endless ropes, suspended on a revolving lan^ 
them or wallower; this is said to have been used for raising ore 
out of a mine. In a nook which I do not possess, ‘‘ bItec- 
ture Hydraulique de Belidj^r, the II vol. of which is said [De La 
Lande’s continuation of Montucla’s Histoire des Mathematir;ues, 
III. 71 i] to contain a detail of all the pumps, ancient and modern, 
hydraulic machines, fountains, wells, &c. I have no doubt this 
Persian wheel, chain pump, chapelets, elevators, by whichever 
name you choose to call it, will be found in various forms. The 
last book I liave to quote for it is Proney’s Architecture Hy- 
draulique, I. advertisement VII. and sec’s 648, 649, in the latter 
of which passages he observes, that the first idea which occurs for 
raising water is to lift it in a bucket by hand ; when the water lies 
too deep to be reached by hand, the bucket is suspended by a chain 
and let down over a pully or windlass ; if it be desired to raise a 
continued stream of water, the simplest means which offers itself 
to the mind is to attach to an endless chain or cork a number of 
pots or buckets, so disposed that the chain being suspended on a 
lanthernor wallower above, and plunged in water below, the buck- 
ets may descend and ascend alternately, filling themselves at bottom, 
and emptying at a certain height above, so as to give a constant 
stream. Some years before the date of Mr. Evans’ patent, a Mr. 
Martin of Caroline county, in this state, constructed a drill plough, 
in which he used the band of buckets for elevating the grain from 
the box, into the funnel which let them down into the furrows : he 
had bands with different setts of buckets, adapted to the size of peas, 
of turnip seed, Sec. I have used this ma,chine for sowing benni seed 
also, and propose to have a band of buckets for drilling Indian corn, 
and another for wheat. Is it possible that in doing this I shall in- 
fringe Mr. Evans’ patent ? That I can be debarred of any use to 
which I might have applied my drill when I bought it, by a patent 
issued after I bought it. 
These verbal descriptions applying so exactly to Mr. Evans’ 
Elevators, and the drawings exhibited to the eye, flash conviction 
both on reason and the senses that there is nothing new in these 
elevators but their being strung together by a strap of leather. If 
this strap of leather be an invention entitling the inventor to a pa- 
tent right, it can only extend to the strap, and the use of the string 
cjf buckets must remain free to be connected by chains, ropes, a. 
