( (• ? z ) » 
^in the liorizonhi Situation 8, 9 ; but when more Ait 
.comes in to 'drive the Water down the Pipe X the 
Buoy will fail to /, and its ^^hank coining down to 1 0, 
.11^ will open the Air Cock M, and Jet out the Air 
Xhe its Deafity what it wili) till it be all difcharg’d, 
and the W'ater is again* got up to M L, and has rais’cf 
.up the. Buoy to L. ' 
. ^ N y is the Fore-part of the Box with iis Hole, to 
which thq Plate of Fig. 5. is fcrew’d. 
it ifS ealiiy conceiv’d, that the Cock H mufl always 
he kft open; that the End of the Pipe Iis fcrew’d to an 
Hole in the Bottom of the Box by means- of Screws at 
V/jtliat there are oiPd Leathers at the Heads of all the 
Screws, and likcwife upon the Plate to make the 
Face O O of Fig. 5. apply it feif clofe to the Fore-part 
gf the Box if(Fig. 8 ) which has an Hole at OO to 
t^d^e.'in the Buoy and Cbck of Figure 6, the Screws at 
1, 2, 4, which have their Heads within the Box, and 
^h.eir Nuts fuch as I (Fig. 5,Jifcrew’d on, when the 
Plate NN is ^ply’d j ^and that the whole Box,, thus^ 
fitted is made Air-tight. 
D in Figure 4. and D Din Fig. 7. reprefent an Iron 
Door, to cover the Mouth of the Air- Cock from ex- 
ternal Injury, and is punch’d full of Holes to let out 
the Air freely. 
^ This Machine, which from its Make, we call’d a 
Jack in a Box, will be ufeful wherever Water is to 
. be convey’d a great way in Pipes , and fince 1 was 
not the foie Contriver of it, 1 ought in jullice to thofe 
that join’d their Thoughts with me, to acquaint the 
Publick, that the Box is the joint Invention of Mr. 
Richard Jones, Mr. James King, Mr. Thomas New- 
comen, Mr. Jofeph Hornhlower, , his Operator, and 
nwjfelf. 
: F I ,N I S. • ‘ 
