( 4082 ) 
and like a Vault, which is likewife to be counter-walled and 
counter-vauited with clay between. This walled fqnare Cavity 
is to be pierced by fix orfeven Metalline pipes, which fliall be 
as big as thofe of Canons, and have their Orifices from \\ ithout ; 
thereby to receive the water of the Magazin to the heigh: of the 
Gallery. The Cocks are to be within, fhut up in the little fpace 
that the faid Cavity is to contain, for to caft the water down fi3 
as it may have a fall of four fathoms. Thefi^ Cocks fbaJl be 
open'd through a window that is at the end of the Gallery. And 
there is to be yet another little aperture beneath, at which one 
inaydefcend into this Chamber, incafe thepafiageof the water 
ftiall be incombred, or that any other inconvenience is to be 
remedied. For which pur pofe there fhall be faflned eight bars 
of Iron in the Wa'ls, like a kind of ftairs, for the conveniency of 
thofe that fliall go dow^n. 
ThisGallery ison!y to fisrve for pafllngto open the Cocks, 
according as there fhall be need of w^ater : And the water failing 
down v/i 11 find iffue through the Aqueduft, following the bed 
of the rivolet ^/udot , falling into the Deriving Channel below 
the Village VandreitL 
It was neceflary to place thefe Pipes fo, as that they might not 
take the water but at about four fathoms high from the ground, 
becaufe 'tis not poflible to make fiich a great collediion of w^aters 
in this Confervatory, efpecially of fuch waters as come, in part, 
from Snows and Rains, withoutftore of dirt^, fand,,ftones,pieces 
of wood, from the neighbouring Forefts; and therefore there 
was an abfolute neceffity to leave Tome fpace for all this fluff , 
to prevent obftrufling or fpoiling the Pipes.On which occafion it 
is to be added, that forafiniich as in length of time this. dirt may 
be heaped up to fuch a height, as to ftop up the Pipes ; to avoid 
this inconvenience, there hath been made in the faid fquare 
.Cavity an Opening below, anfwering,to the Aquedud vvhich 
Opening is to bt commonly fb-ut by a great Iron-gate, that can 
be drawnup, or opened at p'eafure from the Gallery ; that fo 
the water findii^g this vent, and forcibly ifruing,,may carry with 
it aH the dirt , orotherftuf that lhall be gathered at the borton^ 
of thisStore^ioufe. 
This 
