(4^3) 
Toyouv^Udre's'^ I anrweras followeth : jfWhat inoft ofthefe 
^n*s were, fuggefted by Mr. P&yhi raay be eafil j colli ftdcd from the Anfwcri, 
To the frji and fe€o?$d : That damps are moft generally obfcr« 
vcd to come about the latcer end of M^j'^and to continue during the 
heat of Summer ; and inthofe places , which have damps all the 
year long, yet they obferve them to be moft violent at that feafon* 
And I could meet with no other certain rule for any periodical re- 
turns except this Annual ; although it be certain, they do often 
return in the fame Summer. 
To the third: I never heard of damps that kindled of themfel ves^ 
although I have been told , that in feme places they have been 
kindled by the motion of the Sled , in which they draw their 
Coals. 
To the fourth^fifthfiVi^ fix^h\\ : 1 can fay nothing, II Thefe three 
becaufe the Pits were ftopt; but I rather fufpeft it f'^whctbtv 
to be a fluggifli vapour refting in the Vault,than other- the fumes 
wife, becaufe the motion of th^air cures it not only thatcomevi- 
^ fibly out of 
here, but in other places. the mouth of 
the Pit, will 
be lighted by a candle or torch? 2. Whether, !f a piece of a plate, or #ny other 
flat piece of clear copper, be held for a competent time orer the mouth of the Pic 
when the fumes afeefid, any blewifhor greenifhdifcoloration will be made on the 
furface of the Mettal? 34 Whether a light body of a convenient fhape,being tyed 
to a ftring, and held ofer the mouth of the Pit, will be carried up and down with 
abrisknefs that may argue an unufual wind, or current of rapours , coming from 
beneath? 
To th^feve^th : Damps generally are held to be heavier than the 
Air 5 but this was manifeftly lighter,for it lay towards the top of 
the Bink. 
To the gighthi Upon the breaking of the fulminating damp there 
proceeded a dark fmoak, of the fmell and colour of that which 
proceeds from Gun-powder fired. 
To ninth t Many Damps are feen, but many alfo are not 
feen ; which whether they be vifible or nc,is hard to tell. Bat I 
fuppofe, all would be vifible, had we a convenient light to view 
them by, becaufe, be they either thicker or thinner than the Air , 
that denfity or thinnefs will occafion a refrafiion, and that muft 
n^eds render them vifible^. 
; To tht tenth: Some Damps will quite extinguifii all thofe fires 
that are let down into them, be the never fo many fucccfllvely, or 
liever fo great ; and fire is obferved to be fo far from curing , that 
it often creates Damps in places not other wife fubjeft to them. In- 
Nnn 2 deed 
