( Ml ) 
The Cup, AB (Fig. i.) has a vifible Syphon CED 
in it ^ the Cup, (Fig. x.) has the fame, conceal’d by the 
Figure of a Man, to reprefent Tantalus in the Fable j 
and the Cup of Fig . 3. has its Syphon more conceal’d, 
as it is carried up into the Handle. Any of thefe Cups 
will hold Water very well, provided they are not fill’d 
up above the Line F G ^ for then not only the Liquor 
that is above F G will run out, but all the Liquor in 
the Cup as low as D, the Orifice of the fhort Leg of 
the Syphon. 
E XT E RI ME NT. Fig. 4. 
r ’ f i „ * t * * 
In the. Veffel abed is plac’d an open wooden Bo x 
ABCD fill’d with Water as high as the Line LM. 
Another Box or Plug EFGH made tight, and contain- 
ing Weights to fink it, is made to let down into the 
Water between the Partition I K and the End A B of 
the Box above mention’d *, but when it is not to prefs 
the Water up to I O, (as it does when let down) it is 
drawn out of the Water by the Weight w, which pulls 
it up by the Bar i k fatten’d to a Leaver moving round 
the Center l. . 
When, by means of the Plug, the Water in the Space 
AB K I is pufh’d up to I O, by patting under K j it runs 
out thro’ the Spout PCX (whofe Pattage is gaged by a 
little Sluce P/) and falls into the Veilel RS made of 
an oblong Figure like a Fifh-Pond, and having a Syphon 
at S, fo as to make it a Tantalus , or in the Nature of 
the Cups above mentioned. 
Let the Weight m. puli, up the Plug EFG H, and', 
the Water, having fill’d R S, will run down below the 
Orifice P to M. 
The Tantalus R S, beginning to run out as foom as 
full, will for the Reafons above given, continue to run 
Mil 
