  Two experiments are described which are related to the problem of localized
Cooper pairs. Magnetic-field-tuned superconductor-insulator transition was
studied in amorphous In--O films with onset of the superconducting transition
in zero field near 2 K. Experiments performed in the temperature range T>0.3 K
indicate that at the critical field, B=B_c, the first derivative of the
resistance dR/dT is non-zero at T=0 and hence the scaling relations should be
written in more general form. Study of the magnetotransport of high-resistance
metastable alloy Cd-Sb on the insulating side of the superconductor-insulator
transition revealed below 0.1 K a shunting condiction mechanism in addition to
usual one-particle hopping. Possibility of pair hopping is discussed.
