_Mineral Fusible Cement. 83 
damp—and the inside of boxes for packing merchandize which re- 
quires to be preserved from sea damp—and uniting iron pipes either 
for water or gas, more effectually than by lead or any other substance ; 
and for which purposes a mixture composed of two parts of dry sand 
with one part of Mineral Cement, may be applied with great advan- 
tage and economy. It is also applicable in its pure state for coating 
the bottoms of canal beats instead of copper. 
The Mineral Fusible Cement is prepared and sold in casks or pack- 
ages of various sizes, accompanied by proper directions for its use. 
London, January 1, 18) 
N. B. When a parcel of this cement is sent for, an account of the 
mode of using it, is added; and a set of the implements necessary 
(which are cheap,) may be got as patterns for making more. 
{t is known, that the Duke of Wellington, who has been at the 
head of the English Board of Ordnance, and Mr. Nash, the archi- 
tect of the king of England, are in favor of this cement. 
Directions for its use; tools, §c. requisite. 
To be heated in an iron kettle or pot, on either a coal or coke fire, 
to the temperature for melting lead, when used either in its pure state 
or gauged. 
This cement may be gauged with dry sharp sand, in any propor- 
tion as required, not exceeding three fourths sand to one fourth of 
cement, under any circumstance ; such gauging being by weight, and 
not in bulk or measurement ; faking care to well mix the same while 
_ heating. 
Such materials and parts as are Seeiod to be used = or work- 
ed upon by this cement, must be quite dry, or no adhesion thereto 
will take place. 
When the cement in the small kettle becomes too cold for use, it 
may be remelted, without its strength or virtue being deteriorated. 
The inside of tanks or cisterns may be rendered or lined with this 
cement, and made perfectly water proof, with a thickness of one 
Jourth of an inch, (instead of three fourths as with other cements,} 
when gauged with an equal proportion of sand; such tanks or cis- 
terns if made of brickwork being built with or set in this cement; 
thereby making close joints ; but if of wood, slate, iron, or other sub- 
stances, they will only require jointing therewith- 
