C»5) 
3/. What Air-fliafc belongs to the Minef Whether it be hgie 
or more than One ? Of what breadth the Air-fliaft is at the O- 
rifice ? Whether it be convenient enough^ or not? How neer 
it is placed to the Groove^ arid in what pofition f And if there 
be feveral Air-lhafcs, what their diftances and fcituation are ia 
reference to the Groove,and to each other> Or how Air is fup- 
plied, if there be no Air-lliaftsf 
56. Whether they meet with any waters in the Mine r* And, 
if they do, how copious they are 5 at what depths they occurs* 
how they are qualified , and what way they fpring, 
57. Whether they are canflant or temporary ^whether they 
increafe or diminifh notably in Summer or Winter ^ or at any 
other time of the year,and if they dojat what feafon that isjhow 
long it is wont to laft j and the proportions of Incrcafe and 
Decreafe/* 
jg* What Expedients and Engines are employed to free the 
Mines from water ? The materials, the parts, the bigncfs, the 
fliapes, the coaptation i and in (hort, the whole ftrudYure,num- 
ber, and way of applying the Inftruments that are. made ofe 
ofFto free the Mines from water ? 
What are the Conditions, Number, of the -r^i^/Vi f 
40, Whether the .Mine be troubled with D^w/'/.and of what 
kind they arc 5 whether <hey come often or feldome at any let 
time, or altogether irregularly 5 what fign^ fore. run them ; 
what mifchief they doj what remedies are the moft fuccelsfuHy 
imployed againft them, afwell in reference to the Cleering of 
thcMinej as to the Erefervation and recovery of the Wovlu 
men ? 
4.1. What methods tht mine-men ufe in foltowing the Vein^ 
and tracing their paffages under ground(which they call Flum^ 
ming and Dyalling) according to the feveral exigencies ? And 
whether they employ the Inftruments, made with the help df 
the Load- ft6ne,the fame way that is uiual j and if not,whereia 
they differ in the ufe of the fame Inftruments $ or what Inftru- 
ments theyfubftitute in their place ? 
42. What wayes they take to fecure themfelves from the un«* 
certainty, incident to the guidance of MagnstkJ^ Needles from 
ihe /rfi«r/?(?/^5.or OrQj.that they may meet With under grounds 
