Superconductivity of gallium embedded in the porous glass with average
pore size of 4 nm was studied using a SQUID magnetometer. Hysteretic
behavior at both high and low magnetic fields was observed. The quanti
tative model of the superconducting properties of the porous glass wit
h gallium has been developed on the basis of the measurements performe
d. The phase diagram in the H-T plane, including the irreversibility l
ine, was obtained.