[ '88 ] 
So to 73 nearly ; for as So to 73 , fo is 480 to 43 8 $ 
and laftly, that the Avoirdupois Pound and Ounce is 
to the ‘Paris Two Marc Weight and Ounce, as 63 to 
68 nearly 5 for as 63 to 68, fois 7004 to 75 59 - 873 - 
4. The Paris Foot, exprefl'ed in Decimals, is equal 
to 1.0654 of the Englifh Foot, or contains 12.785 
English Inches. 
VI. A Method of making a Gold-colour’d 
Glazing for Earthen-Ware 5 communicated , 
in Latin, in a Letter from .M Godofridus 
Heinfius, AJiron. ! Prof at St. Petersburg!!, 
to Mr. Peter Collinfon, F. R. S. 
i , • Y • '.'Ft 
Read Nov. n. r B 1 A K E of Litharge parts iij. of Sand 
or calcined Flint p. i. pound and 
mix thefe very well together, then tun them into a 
yellow Glafs with a ftrong Fire. Pound this Glafs, 
and grind it into a fubtile Powder, which moiften 
with a well faturated Solution of Silver, make it into 
a Pafte, which put into a Crucible, and cover it with 
a Cover. Give at firft a gentle Degree of Fire, then 
increafe it, and continue it till you have a Glafs, 
which will be green. Pound this Glafs again, and 
grind it to a fine Powder ; moiften this Powder with 
fome Beer, fo that by means of an Hair Pencil you 
may apply it upon the Veftels, [or any Piece of Earth- 
en-ware]. The Veftels that are painted or cover’d 
over with this Glazing, muft be firft well heated, then 
put under a Muffle, and as foon as the Glafs runs, you 
muft * fmoak them, and take out the Veftels. 
* Ajflare ] debes fumum. 
