Northampton during the late Frojl. 589 
below the point of freezing; wind Eafterly; the atmo- 
fphere clear and ferene, but piercing cold. The three 
liquors were reduced to a folid cake of ice. This night, 
about eleven, were placed on the fame wall the following 
liquors; viz, fpirit of Minder erus, volatile fpirit of Sal- 
ammoniac of both kinds, mild and cauftic, dulcified fpirit 
of nitre, red port-wine, and French brandy. 
Jan. 29th, Barometer 29-^; thermometer at n°, that 
is, 2 1 0 below freezing; the Eafterly wind exceflively keen 
and piercing. The roads which, at great labour and ex- 
pence, had juft been cut through for carriages to pafs, were 
again this morning, though no frefii fnow had fallen, com- 
pleatly drifted up. Thele liquors alfo, to my great fur- 
prize, now fliewed evident marks of freezing. They 
were differed to remain, and two more cups were placed 
near them, with highly re£tified fpirit of wine and vi- 
triolic ether. At a little diftance was placed, in a frigo- 
rific mixture, confiding of a combination of the vitriolic 
acid with fnow, about an ounce of crude quickfilver in 
a phial. 
Jan. 30th, The morning clear, but intenfely cold; 
wind S.E.; barometer 30-^; thermometer funk to 9 0 , 
that is, 2 3 0 below the freezing point; a degree of cold 
which, I apprehend, has been but rarely experienced in 
this climate, being 3°J below that of the remarkable 
froft in the year 1739- O n examining the liquors on the 
oarden-wall I found, to my aftonifhment, all of them, 
except the fpirit of wine and ether, perfectly congealed : 
the fil'd time I had ever feen thele liquors in a folid form. 
4 H 2 Being 
