[ 347 ] 
Fig, 2. (gikloo X x) xhQ lid of the box, whofe 
rim [ox 0 x), is a quarter of an inch deeper than 
the box {op Fig i), that the air-holes (o) may be 
pierced in its upper-part; and the lower-part is 
fcolloped with wide fcollops, for the air to pafs 
through the holes (p p Fig. i.) 
Fig, 3. {a b) the milk-boiler, with the broad rim 
{cd)^ and perpendicular rim (f foldered to 
the horizontal rim ; the perpendicular rim to en- 
ter the circular groove [ef) four inches deep full 
of fand, thereby to prevent the afcent of the 
fmoke from the fire-ftove. 
LVIL ExtraEi of a Letter of Thomas Bar- 
ker, Efq\ to the Reverend James Bradley, 
Z). D, Afironomer Royal^ and F, R. R. con- 
cerning the Return of the Cornet^ expe&ed 
S I R, Lyndon, near Uppingham, Rutland, Dec. 17, 1754, 
Read March 20, A S we expedt the comet of iy3i, 
Jr\. 1682, to return in 
1757 or I7f8, it is proper to be aware where to 
look for it. But that will be very different, ac- 
cording to the time of the year it comes ; and its 
period is not fufficiently known to fix the month 
of its next perihelion, which fliould be July 2y, 
1757, according to its laft period; but the length of 
that before would make it Odt. 2f, 1758. I have 
therefore, in 1 2 fhort tables, given the apparent path 
of the comet, fuppofing its perihelion any month in 
Y y 2 the 
