æ new=confiructed "tir- Pump. oie 
‘The plate is fo fixed to the pipe, leading to the cock, that- 
it City Be taken off at pleafure, and ufed as a transferer ; or any 
tube, or apparatus, may be fixed to it, to perform fome experi- 
ments. without removing it, which will lave trouble, and. make 
lefs apparatus neceflary. 
The head of this pump is not divided, as the common one 
is, to diflodge the teeth of the wheel from: the pifton-rods,. 
when the pump is to be taken apart ; but is made whole,. ex- 
cept a {mall piece in the back, where the: wheel. is let in; 
which makes it much more convenient to remove the head, or. 
place it on the barrels.. The wheel is. freed. from the pifton- 
rods, when required, by pufhing it mto the back part of the: 
head ; and when it is drawn into its place and connected. with: 
them. again, a button- is fcrewed into: the focket of thes axis-be-- 
hind, to keep it inits place: This makes: the head lefs trouble- 
fome to-remove : but its chief ufe is to dilodge the p ifton-rod 
fom the wheel, that they may be: put down into the ith. 
when the pump is not in ufe, where they will fand neon 
prefied, and retain their elaflicity better than.if kept in the: 
barrels. In thefe cifterns they may alfo ftand ‘covered. with oil, 
if ER as they are large enough: to admit of i ubi 
The principal joints of the pamp are funk. in pre ‘that 
- leathers, which clofe them, may be covered. ‘with:oil,. to: 
prevent leaking. 7 
For convenience, the lower part: of the pump i is need with: 
drawers, to contain. the Ku A: door opens t behind one 
range: 
* endis I find, is very effectual ; m never known one: of the joints, fecured: 
in this way, to leak, though the pump has Rood for a long time ; whereas a port- 
able pump ‘which Thaye; made by Mr. Na bus Londen, has leaked, and repeatedly 
‘Been refitted with new- -oiled leathers, in the fame time, 
