S3 Mineral Fusible Cement. 



the bottom, and this weight (of upivards of six hundred pounds) was 

 supported entirely by the adhesion of the cement to the iron plug 

 and the granite. 



Some further experiments were made at the Tower in December 

 last, under the direction of Mr. Wright, the clerk of the works ; 

 when one bushel of dry sand was found to weigh one hundred and 

 thirty pounds, and one bushel of Mineral Cement in a solid body 

 one hundred and fourteen pounds. These experiments were made 

 with a composition of two hundred and twenty eight pounds of sand 

 and one hundred and fourteen pounds of cement, mixed together by 

 melting; and 1st. Two fences were united by a joint of one fourth 

 of an inch with this gauged cement, and suspended by a chain which 

 bore a weight of one thousand three hundred and forty four pounds, 

 when one of the bricks split ; but the joint, with about one fourth of 

 an inch of the brick attached to it, remained perfect. 2d. Bricks 

 were united with this gauged cement, in the same manner as descri- 

 bed in experiment No. 3 at the King's Mews, and extended to eigh- 

 teen joints, when the second brick broke. 



The cement being thus properly guaged, will unite bricks so firmly, 

 that when coated with a mixture of three fourths sand and one fourth 

 cement, they will form a solid body superior in strength and quality 

 to sandstone ; and applicable to similar purposes. From these ex- 

 periments it is evident that the Mineral Fusible Cement possesses 

 two invaluable properties, viz. resistance to ivater and damp, and 

 powerful adhesiveness. Of the latter property we may observe, that 

 wood may be united to wood, iron, stone, brick, tiles or slate ; and 

 any of these bodies to each other, indiscriminately ; by means of this 

 cement. [It may be added that it is very rare for one cement to 

 suit so many objects.] 



It is difficult to point out all the uses to which this valuable cement 

 may be applied. Among the most prominent may be named, the 

 formation and lining of tanks or cisterns, the lining of damp rooms or 

 cellars, coating the outside of houses, which would effectually keep 

 out damp — for gutters on the roofs of houses, instead of diat expen- 

 sive article, lead — for building turrets or minarets of churches — light- 

 houses, where the firmest union of parts is required — the abutments 

 of a series of arches — -fastening iron railings in stone copings — pre- 

 serving wood in damp foundations, by coating it with cement — in 

 jointing stone copings, rendering the use of lead or iron cramps un~ 

 necessary — lining the inside of churches, to preserve them from 



