he age sas Wenewoon's Method of connefting — i 
| a Tamas S Wend : 
oe of the feale bt my, eee 82297?) 24d orlyt tg 
Greateft heat of my {mall air-furnace - 23 879, 1Odrors 



€aft iron melts. - ~ hye) sy tre) i aye aged 
Greateft heat of a common fmith’s forge, 17327. 125§.0.. 
Welding heat of iron, greate non do Aayiotud 34 7es99 So aa 
»deakkionotrrody einihmke7 ey oso@leids 
Fine gold melts - Plott na chee Ra oes tae 
Fine filver melts < ~ 12 KATZ as 2816 
Swedith copper melts MASS ot SOP ied aah 
Brafs melts - : Ai a 3807 2i 
Heat by which myenamel colours are burnt on (1857) 6 
Red-heat fully wifible in day-light - 1074 Or. 
Red-heat fully vifible in the dark - 9 94Fc ESisic'n? 
Mercury boils - - - 680) | cy Behetehetl 
Water boils - ° . BEey ibe ihe 
Vital heat - - - 97 7 dd fiat 
Water freezes - - ‘o9t) oft ot vQ@oreets Ohtees 
Proof f{pirit freezes - i= = Duatoneleaiie 
The point at which mercury ap key : oil 
confequently the limit of mercurial $ about 40 $525 
thermometers, = ‘ j 
To affift our conceptions of this fubje&, it may be proper to 
view it in another light, and endeavour to prefent it to the 
eye; for zumbers, on ahigh fcale, are with difficulty eftimated 
and compared by the mind. I have therefore completed the 
{cales of which a part is reprefented in fig. 1. and 3. by conti- 
nuing the fame equal divifions, both upwards and downwards, 
as far as the utmoft limits of heat that have hitherto been 
attained and meafured *. | | 0d eS HiKk 
* Mr. WEpGwoop prefented this, in the fotm of a very long roll, to the Societys 
Ol ie 



