Abstract: An aqueous slurry comprises (a) a crystalline aluminosilicate represented by the empirical formula M2/nO.Al2O3.xSiO2.yH2O wherein M represents a first metal moiety, said first metal having a valency of n, x is the molar ratio of silica to alumina and y indicates the molar ratio of water to alumina, (b) a mineral or organic acid, and (c) particulate silica. The silica may have a BET surface area greater than 500 m2/g and a pore volume, as measured by nitrogen manometry of less than 2.1 cm3/g. The slurry is stable on storage but has a low viscosity at low shear rate.

Abstract: A rotating positioning vise for use in hand working operations. The positioning mechanism utilizes a permanent magnet that is lifted off the surface of a turntable by the means of a lever. The user pushes on the lever, moves the vise in the position desired and then releases of the lever. Releasing the lever allows the magnet to be pulled back down against the turntable's surface and locks the vise in position.

Abstract: An aqueous slurry according to the invention comprises (a) a crystalline aluminosilicate represented by the empirical formula M2/nO Al2O3.xSiO2.yH2O wherein M represents a first metal moiety, said first metal having a valency of n, x indicates the ratio of atoms of silicon to atoms of aluminium and y indicates the ratio of molecules of water to atoms of aluminium, (b) a salt of a second metal selected from the group consisting of Group III metals, metallic elements of Group IV, magnesium, titanium, chromium, iron, nickel, copper, zinc, zirconium and silver, said salt of a second metal being present in an amount which is sufficient to replace from about 2.0 to about 40 per cent by weight of the first metal moiety, and (c) particulate silica having a BET surface area greater than 500 m2/g and a pore volume, as measured by nitrogen manometry of less than 2.1 cm3/g. The slurry is stable on storage but has a low viscosity at low shear rate.